20972832404 has 6 divisors (see below), whose sum is σ = 36702456714. Its totient is φ = 10486416200.

The previous prime is 20972832403. The next prime is 20972832449. The reversal of 20972832404 is 40423827902.

It can be written as a sum of positive squares in only one way, i.e., 20972832400 + 4 = 144820^2 + 2^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20972832403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2621604047 + ... + 2621604054.

It is an arithmetic number, because the mean of its divisors is an integer number (6117076119).

Almost surely, 2^20972832404 is an apocalyptic number.

It is an amenable number.

20972832404 is a deficient number, since it is larger than the sum of its proper divisors (15729624310).

20972832404 is a wasteful number, since it uses less digits than its factorization.

20972832404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243208105 (or 5243208103 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 20972832404 in words is "twenty billion, nine hundred seventy-two million, eight hundred thirty-two thousand, four hundred four".