19712951390 has 128 divisors (see below), whose sum is σ = 41263782912. Its totient is φ = 6714731520.

The previous prime is 19712951351. The next prime is 19712951393. The reversal of 19712951390 is 9315921791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19712951393) 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, 12774959 + ... + 12776501.

It is an arithmetic number, because the mean of its divisors is an integer number (322373304).

Almost surely, 2^19712951390 is an apocalyptic number.

19712951390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19712951390 is an abundant number, since it is smaller than the sum of its proper divisors (21550831522).

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

19712951390 is a wasteful number, since it uses less digits than its factorization.

19712951390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714.

The product of its (nonzero) digits is 153090, while the sum is 47.

The spelling of 19712951390 in words is "nineteen billion, seven hundred twelve million, nine hundred fifty-one thousand, three hundred ninety".