20156979195 has 80 divisors (see below), whose sum is σ = 36524537280. Its totient is φ = 10634582016.

The previous prime is 20156979149. The next prime is 20156979259. The reversal of 20156979195 is 59197965102.

20156979195 is a `hidden beast` number, since 2 + 0 + 1 + 569 + 79 + 1 + 9 + 5 = 666.

It is not a de Polignac number, because 20156979195 - 2²¹ = 20154882043 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 24024586 + ... + 24025424.

It is an arithmetic number, because the mean of its divisors is an integer number (456556716).

Almost surely, 2^20156979195 is an apocalyptic number.

20156979195 is a deficient number, since it is larger than the sum of its proper divisors (16367558085).

20156979195 is a wasteful number, since it uses less digits than its factorization.

20156979195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 1530900, while the sum is 54.

The spelling of 20156979195 in words is "twenty billion, one hundred fifty-six million, nine hundred seventy-nine thousand, one hundred ninety-five".