20543468788 has 24 divisors (see below), whose sum is σ = 36373344840. Its totient is φ = 10151201280.

The previous prime is 20543468723. The next prime is 20543468791. The reversal of 20543468788 is 88786434502.

It can be written as a sum of positive squares in 4 ways, for example, as 6688295524 + 13855173264 = 81782^2 + 117708^2 .

It is a congruent number.

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, 748720 + ... + 775672.

It is an arithmetic number, because the mean of its divisors is an integer number (1515556035).

Almost surely, 2^20543468788 is an apocalyptic number.

It is an amenable number.

20543468788 is a deficient number, since it is larger than the sum of its proper divisors (15829876052).

20543468788 is a wasteful number, since it uses less digits than its factorization.

20543468788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29187 (or 29185 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 55.

The spelling of 20543468788 in words is "twenty billion, five hundred forty-three million, four hundred sixty-eight thousand, seven hundred eighty-eight".