19621093724 has 12 divisors (see below), whose sum is σ = 34354002648. Its totient is φ = 9805664400.

The previous prime is 19621093721. The next prime is 19621093729. The reversal of 19621093724 is 42739012691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19621093721) 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, 1211567 + ... + 1227654.

It is an arithmetic number, because the mean of its divisors is an integer number (2862833554).

Almost surely, 2^19621093724 is an apocalyptic number.

It is an amenable number.

19621093724 is a deficient number, since it is larger than the sum of its proper divisors (14732908924).

19621093724 is a wasteful number, since it uses less digits than its factorization.

19621093724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441236 (or 2441234 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 19621093724 in words is "nineteen billion, six hundred twenty-one million, ninety-three thousand, seven hundred twenty-four".