20149635 has 32 divisors (see below), whose sum is σ = 36391680. Its totient is φ = 9430400.

The previous prime is 20149627. The next prime is 20149637. The reversal of 20149635 is 53694102.

It is not a de Polignac number, because 20149635 - 2³ = 20149627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20149637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2680 + ... + 6890.

It is an arithmetic number, because the mean of its divisors is an integer number (1137240).

Almost surely, 2^20149635 is an apocalyptic number.

20149635 is a deficient number, since it is larger than the sum of its proper divisors (16242045).

20149635 is a wasteful number, since it uses less digits than its factorization.

20149635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20149635 is about 4488.8344812434. The cubic root of 20149635 is about 272.1170335107.

The spelling of 20149635 in words is "twenty million, one hundred forty-nine thousand, six hundred thirty-five".