20078972586 has 48 divisors (see below), whose sum is σ = 44326249344. Its totient is φ = 6567340032.

The previous prime is 20078972581. The next prime is 20078972611. The reversal of 20078972586 is 68527987002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20078972581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277551 + ... + 342333.

It is an arithmetic number, because the mean of its divisors is an integer number (923463528).

Almost surely, 2^20078972586 is an apocalyptic number.

20078972586 is an abundant number, since it is smaller than the sum of its proper divisors (24247276758).

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

20078972586 is a wasteful number, since it uses less digits than its factorization.

20078972586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65115 (or 65112 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 20078972586 in words is "twenty billion, seventy-eight million, nine hundred seventy-two thousand, five hundred eighty-six".