19907486919 has 24 divisors (see below), whose sum is σ = 29757931632. Its totient is φ = 12814364160.

The previous prime is 19907486917. The next prime is 19907486927. The reversal of 19907486919 is 91968470991.

It is not a de Polignac number, because 19907486919 - 2¹ = 19907486917 is a prime.

It is a super-2 number, since 2×19907486919² (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 (19907486917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184554 + ... + 271799.

It is an arithmetic number, because the mean of its divisors is an integer number (1239913818).

Almost surely, 2^19907486919 is an apocalyptic number.

19907486919 is a deficient number, since it is larger than the sum of its proper divisors (9850444713).

19907486919 is a wasteful number, since it uses less digits than its factorization.

19907486919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456527 (or 456524 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 63.

The spelling of 19907486919 in words is "nineteen billion, nine hundred seven million, four hundred eighty-six thousand, nine hundred nineteen".