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21412737 = 324794967
BaseRepresentation
bin101000110101…
…1101110000001
31111021212202100
41101223232001
520440201422
62042541013
7350001543
oct121535601
944255670
1021412737
11110a5785
127207769
134589478
142bb5693
151d2e7ac
hex146bb81

21412737 has 12 divisors (see below), whose sum is σ = 31000320. Its totient is φ = 14242488.

The previous prime is 21412717. The next prime is 21412739. The reversal of 21412737 is 73721412.

It is a happy number.

It is not a de Polignac number, because 21412737 - 210 = 21411713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21412737.

It is not an unprimeable number, because it can be changed into a prime (21412739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1828 + ... + 6794.

It is an arithmetic number, because the mean of its divisors is an integer number (2583360).

Almost surely, 221412737 is an apocalyptic number.

It is an amenable number.

21412737 is a deficient number, since it is larger than the sum of its proper divisors (9587583).

21412737 is a wasteful number, since it uses less digits than its factorization.

21412737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5452 (or 5449 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 21412737 is about 4627.3898690298. The cubic root of 21412737 is about 277.6881801284.

The spelling of 21412737 in words is "twenty-one million, four hundred twelve thousand, seven hundred thirty-seven".

Divisors: 1 3 9 479 1437 4311 4967 14901 44703 2379193 7137579 21412737