20340149 has 8 divisors (see below), whose sum is σ = 20655000. Its totient is φ = 20027392.

The previous prime is 20340101. The next prime is 20340167. The reversal of 20340149 is 94104302.

It can be written as a sum of positive squares in 4 ways, for example, as 3880900 + 16459249 = 1970^2 + 4057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20340149 - 2¹⁶ = 20274613 is a prime.

It is a super-2 number, since 2×20340149² = 827443322684402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340179) 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, 39707 + ... + 40215.

It is an arithmetic number, because the mean of its divisors is an integer number (2581875).

Almost surely, 2^20340149 is an apocalyptic number.

It is an amenable number.

20340149 is a deficient number, since it is larger than the sum of its proper divisors (314851).

20340149 is an equidigital number, since it uses as much as digits as its factorization.

20340149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20340149 is about 4510.0054323692. The cubic root of 20340149 is about 272.9719632905.

It can be divided in two parts, 203401 and 49, that multiplied together give a square (9966649 = 3157²).

The spelling of 20340149 in words is "twenty million, three hundred forty thousand, one hundred forty-nine".