19353974654 has 12 divisors (see below), whose sum is σ = 33179134632. Its totient is φ = 8294337480.

The previous prime is 19353974641. The next prime is 19353974669. The reversal of 19353974654 is 45647935391.

It is a self number, because there is not a number n which added to its sum of digits gives 19353974654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 501944 + ... + 539124.

It is an arithmetic number, because the mean of its divisors is an integer number (2764927886).

Almost surely, 2^19353974654 is an apocalyptic number.

19353974654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19353974654 is a deficient number, since it is larger than the sum of its proper divisors (13825159978).

19353974654 is an frugal number, since it uses more digits than its factorization.

19353974654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74371 (or 37190 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 56.

Multiplying 19353974654 by its sum of digits (56), we get a square (1083822580624 = 1041068²).

The spelling of 19353974654 in words is "nineteen billion, three hundred fifty-three million, nine hundred seventy-four thousand, six hundred fifty-four".