19450464972 has 24 divisors (see below), whose sum is σ = 45386702592. Its totient is φ = 6483162000.

The previous prime is 19450464953. The next prime is 19450464973. The reversal of 19450464972 is 27946405491.

It is not an unprimeable number, because it can be changed into a prime (19450464973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387097 + ... + 434447.

It is an arithmetic number, because the mean of its divisors is an integer number (1891112608).

Almost surely, 2^19450464972 is an apocalyptic number.

19450464972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19450464972 is an abundant number, since it is smaller than the sum of its proper divisors (25936237620).

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

19450464972 is a wasteful number, since it uses less digits than its factorization.

19450464972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81589 (or 81587 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 19450464972 in words is "nineteen billion, four hundred fifty million, four hundred sixty-four thousand, nine hundred seventy-two".