20774870 has 16 divisors (see below), whose sum is σ = 37538640. Its totient is φ = 8277984.

The previous prime is 20774869. The next prime is 20774881. The reversal of 20774870 is 7847702.

It is a self number, because there is not a number n which added to its sum of digits gives 20774870.

It is a congruent number.

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, 1172 + ... + 6551.

It is an arithmetic number, because the mean of its divisors is an integer number (2346165).

Almost surely, 2^20774870 is an apocalyptic number.

20774870 is a deficient number, since it is larger than the sum of its proper divisors (16763770).

20774870 is a wasteful number, since it uses less digits than its factorization.

20774870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7999.

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 20774870 is about 4557.9458092435. The cubic root of 20774870 is about 274.9029740356.

The spelling of 20774870 in words is "twenty million, seven hundred seventy-four thousand, eight hundred seventy".