19901712 has 40 divisors (see below), whose sum is σ = 52389504. Its totient is φ = 6507904.

The previous prime is 19901701. The next prime is 19901723. The reversal of 19901712 is 21710991.

It is an interprime number because it is at equal distance from previous prime (19901701) and next prime (19901723).

It is a self number, because there is not a number n which added to its sum of digits gives 19901712.

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, 1368 + ... + 6455.

Almost surely, 2^19901712 is an apocalyptic number.

19901712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19901712 is an abundant number, since it is smaller than the sum of its proper divisors (32487792).

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

19901712 is a wasteful number, since it uses less digits than its factorization.

19901712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7887 (or 7881 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 19901712 is about 4461.1334882516. The cubic root of 19901712 is about 270.9963734576.

The spelling of 19901712 in words is "nineteen million, nine hundred one thousand, seven hundred twelve".