20438823772 has 12 divisors (see below), whose sum is σ = 35774244576. Its totient is φ = 10217611040.

The previous prime is 20438823737. The next prime is 20438823793. The reversal of 20438823772 is 27732883402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424513 + ... + 470200.

It is an arithmetic number, because the mean of its divisors is an integer number (2981187048).

Almost surely, 2^20438823772 is an apocalyptic number.

It is an amenable number.

20438823772 is a deficient number, since it is larger than the sum of its proper divisors (15335420804).

20438823772 is a wasteful number, since it uses less digits than its factorization.

20438823772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900428 (or 900426 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 20438823772 in words is "twenty billion, four hundred thirty-eight million, eight hundred twenty-three thousand, seven hundred seventy-two".