20513041488 has 30 divisors (see below), whose sum is σ = 57408026234. Its totient is φ = 6837680448.

The previous prime is 20513041481. The next prime is 20513041541. The reversal of 20513041488 is 88414031502.

20513041488 is a `hidden beast` number, since 2 + 0 + 5 + 130 + 41 + 488 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10578533904 + 9934507584 = 102852^2 + 99672^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20513041481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71225695 + ... + 71225982.

Almost surely, 2^20513041488 is an apocalyptic number.

It is an amenable number.

20513041488 is an abundant number, since it is smaller than the sum of its proper divisors (36894984746).

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

20513041488 is a wasteful number, since it uses less digits than its factorization.

20513041488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142451691 (or 142451682 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 20513041488 in words is "twenty billion, five hundred thirteen million, forty-one thousand, four hundred eighty-eight".