19700451528 has 16 divisors (see below), whose sum is σ = 49251128880. Its totient is φ = 6566817168.

The previous prime is 19700451499. The next prime is 19700451557. The reversal of 19700451528 is 82515400791.

It is an interprime number because it is at equal distance from previous prime (19700451499) and next prime (19700451557).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 19700451528.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410426050 + ... + 410426097.

It is an arithmetic number, because the mean of its divisors is an integer number (3078195555).

Almost surely, 2^19700451528 is an apocalyptic number.

It is an amenable number.

19700451528 is an abundant number, since it is smaller than the sum of its proper divisors (29550677352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19700451528 is a wasteful number, since it uses less digits than its factorization.

19700451528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820852156 (or 820852152 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 19700451528 in words is "nineteen billion, seven hundred million, four hundred fifty-one thousand, five hundred twenty-eight".