19727452654 has 32 divisors (see below), whose sum is σ = 36480116736. Its totient is φ = 7791366240.

The previous prime is 19727452603. The next prime is 19727452663. The reversal of 19727452654 is 45625472791.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21189 + ... + 199759.

It is an arithmetic number, because the mean of its divisors is an integer number (1140003648).

Almost surely, 2^19727452654 is an apocalyptic number.

19727452654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19727452654 is a deficient number, since it is larger than the sum of its proper divisors (16752664082).

19727452654 is a wasteful number, since it uses less digits than its factorization.

19727452654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179200.

The product of its digits is 4233600, while the sum is 52.

The spelling of 19727452654 in words is "nineteen billion, seven hundred twenty-seven million, four hundred fifty-two thousand, six hundred fifty-four".