20953378 has 32 divisors (see below), whose sum is σ = 33747840. Its totient is φ = 9744000.

The previous prime is 20953363. The next prime is 20953381. The reversal of 20953378 is 87335902.

It is a super-2 number, since 2×20953378² = 878088099221768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295083 + ... + 295153.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^20953378 is an apocalyptic number.

20953378 is a deficient number, since it is larger than the sum of its proper divisors (12794462).

20953378 is a wasteful number, since it uses less digits than its factorization.

20953378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 20953378 is about 4577.4859912402. The cubic root of 20953378 is about 275.6880972123.

The spelling of 20953378 in words is "twenty million, nine hundred fifty-three thousand, three hundred seventy-eight".