20844434972 has 12 divisors (see below), whose sum is σ = 37096028760. Its totient is φ = 10245569616.

The previous prime is 20844434971. The next prime is 20844434977. The reversal of 20844434972 is 27943444802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20844434971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44161703 + ... + 44162174.

It is an arithmetic number, because the mean of its divisors is an integer number (3091335730).

Almost surely, 2^20844434972 is an apocalyptic number.

It is an amenable number.

20844434972 is a deficient number, since it is larger than the sum of its proper divisors (16251593788).

20844434972 is a wasteful number, since it uses less digits than its factorization.

20844434972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88323940 (or 88323938 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 47.

The spelling of 20844434972 in words is "twenty billion, eight hundred forty-four million, four hundred thirty-four thousand, nine hundred seventy-two".