20306757064 has 32 divisors (see below), whose sum is σ = 42659164800. Its totient is φ = 8980873920.

The previous prime is 20306757047. The next prime is 20306757071. The reversal of 20306757064 is 46075760302.

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, 3115104 + ... + 3121615.

It is an arithmetic number, because the mean of its divisors is an integer number (1333098900).

Almost surely, 2^20306757064 is an apocalyptic number.

It is an amenable number.

20306757064 is an abundant number, since it is smaller than the sum of its proper divisors (22352407736).

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

20306757064 is a wasteful number, since it uses less digits than its factorization.

20306757064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6236773 (or 6236769 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 20306757064 in words is "twenty billion, three hundred six million, seven hundred fifty-seven thousand, sixty-four".