19420952512 has 28 divisors (see below), whose sum is σ = 41502950776. Its totient is φ = 8963516160.

The previous prime is 19420952491. The next prime is 19420952513. The reversal of 19420952512 is 21525902491.

It is a super-2 number, since 2×19420952512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19420952513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11670414 + ... + 11672077.

It is an arithmetic number, because the mean of its divisors is an integer number (1482248242).

Almost surely, 2^19420952512 is an apocalyptic number.

It is an amenable number.

19420952512 is an abundant number, since it is smaller than the sum of its proper divisors (22081998264).

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

19420952512 is a wasteful number, since it uses less digits than its factorization.

19420952512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23342516 (or 23342506 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 19420952512 in words is "nineteen billion, four hundred twenty million, nine hundred fifty-two thousand, five hundred twelve".