20915146 has 16 divisors (see below), whose sum is σ = 36463680. Its totient is φ = 8811360.

The previous prime is 20915123. The next prime is 20915179. The reversal of 20915146 is 64151902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11835 + ... + 13486.

It is an arithmetic number, because the mean of its divisors is an integer number (2278980).

Almost surely, 2^20915146 is an apocalyptic number.

20915146 is a deficient number, since it is larger than the sum of its proper divisors (15548534).

20915146 is a wasteful number, since it uses less digits than its factorization.

20915146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25389.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 20915146 is about 4573.3079931271. The cubic root of 20915146 is about 275.5203195806.

The spelling of 20915146 in words is "twenty million, nine hundred fifteen thousand, one hundred forty-six".