20270978 has 32 divisors (see below), whose sum is σ = 37761024. Its totient is φ = 7947072.

The previous prime is 20270969. The next prime is 20270989. The reversal of 20270978 is 87907202.

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, 22676 + ... + 23552.

It is an arithmetic number, because the mean of its divisors is an integer number (1180032).

Almost surely, 2^20270978 is an apocalyptic number.

20270978 is a deficient number, since it is larger than the sum of its proper divisors (17490046).

20270978 is a wasteful number, since it uses less digits than its factorization.

20270978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 20270978 is about 4502.3302855299. The cubic root of 20270978 is about 272.6621788015.

The spelling of 20270978 in words is "twenty million, two hundred seventy thousand, nine hundred seventy-eight".