20776938 has 32 divisors (see below), whose sum is σ = 51144576. Its totient is φ = 5479488.

The previous prime is 20776927. The next prime is 20776957. The reversal of 20776938 is 83967702.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 20776938.

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, 18481 + ... + 19572.

It is an arithmetic number, because the mean of its divisors is an integer number (1598268).

Almost surely, 2^20776938 is an apocalyptic number.

20776938 is an abundant number, since it is smaller than the sum of its proper divisors (30367638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20776938 is a wasteful number, since it uses less digits than its factorization.

20776938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38078.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 20776938 is about 4558.1726601786. The cubic root of 20776938 is about 274.9120953199.

The spelling of 20776938 in words is "twenty million, seven hundred seventy-six thousand, nine hundred thirty-eight".