19312947951 has 64 divisors (see below), whose sum is σ = 29930729472. Its totient is φ = 10967040000.

The previous prime is 19312947923. The next prime is 19312947961. The reversal of 19312947951 is 15974921391.

It is not a de Polignac number, because 19312947951 - 2⁵ = 19312947919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19312947894 and 19312947903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19312947961) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5744511 + ... + 5747871.

It is an arithmetic number, because the mean of its divisors is an integer number (467667648).

Almost surely, 2^19312947951 is an apocalyptic number.

19312947951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19312947951 is a deficient number, since it is larger than the sum of its proper divisors (10617781521).

19312947951 is a wasteful number, since it uses less digits than its factorization.

19312947951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584.

The product of its digits is 612360, while the sum is 51.

The spelling of 19312947951 in words is "nineteen billion, three hundred twelve million, nine hundred forty-seven thousand, nine hundred fifty-one".