19209739740 has 48 divisors (see below), whose sum is σ = 53795914368. Its totient is φ = 5121774144.

The previous prime is 19209739721. The next prime is 19209739753. The reversal of 19209739740 is 4793790291.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412479 + ... + 456681.

It is an arithmetic number, because the mean of its divisors is an integer number (1120748216).

Almost surely, 2^19209739740 is an apocalyptic number.

19209739740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19209739740 is an abundant number, since it is smaller than the sum of its proper divisors (34586174628).

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

19209739740 is a wasteful number, since it uses less digits than its factorization.

19209739740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51458 (or 51456 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 51.

The spelling of 19209739740 in words is "nineteen billion, two hundred nine million, seven hundred thirty-nine thousand, seven hundred forty".