20440621372 has 24 divisors (see below), whose sum is σ = 35911717184. Its totient is φ = 10180199232.

The previous prime is 20440621351. The next prime is 20440621393. The reversal of 20440621372 is 27312604402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20440621351) and next prime (20440621393).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1279498 + ... + 1295374.

Almost surely, 2^20440621372 is an apocalyptic number.

It is an amenable number.

20440621372 is a deficient number, since it is larger than the sum of its proper divisors (15471095812).

20440621372 is a wasteful number, since it uses less digits than its factorization.

20440621372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17125 (or 17123 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 20440621372 in words is "twenty billion, four hundred forty million, six hundred twenty-one thousand, three hundred seventy-two".