20557334724 has 24 divisors (see below), whose sum is σ = 47970504288. Its totient is φ = 6851960640.

The previous prime is 20557334723. The next prime is 20557334801. The reversal of 20557334724 is 42743375502.

It is not an unprimeable number, because it can be changed into a prime (20557334723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143979 + ... + 248685.

It is an arithmetic number, because the mean of its divisors is an integer number (1998771012).

Almost surely, 2^20557334724 is an apocalyptic number.

It is an amenable number.

20557334724 is an abundant number, since it is smaller than the sum of its proper divisors (27413169564).

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

20557334724 is a wasteful number, since it uses less digits than its factorization.

20557334724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121075 (or 121073 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 42.

The spelling of 20557334724 in words is "twenty billion, five hundred fifty-seven million, three hundred thirty-four thousand, seven hundred twenty-four".