20451045388 has 6 divisors (see below), whose sum is σ = 35789329436. Its totient is φ = 10225522692.

The previous prime is 20451045353. The next prime is 20451045431. The reversal of 20451045388 is 88354015402.

It is a self number, because there is not a number n which added to its sum of digits gives 20451045388.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2556380670 + ... + 2556380677.

Almost surely, 2^20451045388 is an apocalyptic number.

It is an amenable number.

20451045388 is a deficient number, since it is larger than the sum of its proper divisors (15338284048).

20451045388 is a wasteful number, since it uses less digits than its factorization.

20451045388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112761351 (or 5112761349 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 20451045388 in words is "twenty billion, four hundred fifty-one million, forty-five thousand, three hundred eighty-eight".