20437743772 has 6 divisors (see below), whose sum is σ = 35766051608. Its totient is φ = 10218871884.

The previous prime is 20437743769. The next prime is 20437743773. The reversal of 20437743772 is 27734773402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20437743773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2554717968 + ... + 2554717975.

Almost surely, 2^20437743772 is an apocalyptic number.

It is an amenable number.

20437743772 is a deficient number, since it is larger than the sum of its proper divisors (15328307836).

20437743772 is a wasteful number, since it uses less digits than its factorization.

20437743772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109435947 (or 5109435945 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 46.

The spelling of 20437743772 in words is "twenty billion, four hundred thirty-seven million, seven hundred forty-three thousand, seven hundred seventy-two".