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21314812 = 2237592441
BaseRepresentation
bin101000101001…
…1110011111100
31111002220102111
41101103303330
520424033222
62040503404
7346113211
oct121236374
944086374
1021314812
1111039152
12717ab64
134553a1c
142b8bb08
151d10777
hex1453cfc

21314812 has 24 divisors (see below), whose sum is σ = 38974320. Its totient is φ = 10189440.

The previous prime is 21314779. The next prime is 21314819. The reversal of 21314812 is 21841312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7512 + ... + 9952.

It is an arithmetic number, because the mean of its divisors is an integer number (1623930).

Almost surely, 221314812 is an apocalyptic number.

It is an amenable number.

21314812 is a deficient number, since it is larger than the sum of its proper divisors (17659508).

21314812 is a wasteful number, since it uses less digits than its factorization.

21314812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541 (or 2539 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 21314812 is about 4616.7967250032. The cubic root of 21314812 is about 277.2642241559.

The spelling of 21314812 in words is "twenty-one million, three hundred fourteen thousand, eight hundred twelve".

Divisors: 1 2 4 37 59 74 118 148 236 2183 2441 4366 4882 8732 9764 90317 144019 180634 288038 361268 576076 5328703 10657406 21314812