19904129812 has 48 divisors (see below), whose sum is σ = 40297944960. Its totient is φ = 8425612800.

The previous prime is 19904129809. The next prime is 19904129813. The reversal of 19904129812 is 21892140991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19904129813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2715112 + ... + 2722432.

It is an arithmetic number, because the mean of its divisors is an integer number (839540520).

Almost surely, 2^19904129812 is an apocalyptic number.

It is an amenable number.

19904129812 is an abundant number, since it is smaller than the sum of its proper divisors (20393815148).

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

19904129812 is a wasteful number, since it uses less digits than its factorization.

19904129812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8512 (or 8510 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 46.

The spelling of 19904129812 in words is "nineteen billion, nine hundred four million, one hundred twenty-nine thousand, eight hundred twelve".