20154534544 has 40 divisors (see below), whose sum is σ = 41145848640. Its totient is φ = 9537314688.

The previous prime is 20154534539. The next prime is 20154534551. The reversal of 20154534544 is 44543545102.

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, 275229 + ... + 340675.

It is an arithmetic number, because the mean of its divisors is an integer number (1028646216).

Almost surely, 2^20154534544 is an apocalyptic number.

It is an amenable number.

20154534544 is an abundant number, since it is smaller than the sum of its proper divisors (20991314096).

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

20154534544 is a wasteful number, since it uses less digits than its factorization.

20154534544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66487 (or 66481 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 37.

The spelling of 20154534544 in words is "twenty billion, one hundred fifty-four million, five hundred thirty-four thousand, five hundred forty-four".