20549067972 has 24 divisors (see below), whose sum is σ = 48030939936. Its totient is φ = 6837815808.

The previous prime is 20549067971. The next prime is 20549068049. The reversal of 20549067972 is 27976094502.

It is not an unprimeable number, because it can be changed into a prime (20549067971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476978 + ... + 1490825.

It is an arithmetic number, because the mean of its divisors is an integer number (2001289164).

Almost surely, 2^20549067972 is an apocalyptic number.

It is an amenable number.

20549067972 is an abundant number, since it is smaller than the sum of its proper divisors (27481871964).

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

20549067972 is a wasteful number, since it uses less digits than its factorization.

20549067972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968387 (or 2968385 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 20549067972 in words is "twenty billion, five hundred forty-nine million, sixty-seven thousand, nine hundred seventy-two".