19435129940 has 24 divisors (see below), whose sum is σ = 40931406432. Its totient is φ = 7751645600.

The previous prime is 19435129939. The next prime is 19435129969. The reversal of 19435129940 is 4992153491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1393286 + ... + 1407165.

It is an arithmetic number, because the mean of its divisors is an integer number (1705475268).

Almost surely, 2^19435129940 is an apocalyptic number.

19435129940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19435129940 is an abundant number, since it is smaller than the sum of its proper divisors (21496276492).

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

19435129940 is a wasteful number, since it uses less digits than its factorization.

19435129940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800807 (or 2800805 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 19435129940 in words is "nineteen billion, four hundred thirty-five million, one hundred twenty-nine thousand, nine hundred forty".