19902709230492 has 72 divisors (see below), whose sum is σ = 51057624457728. Its totient is φ = 6029660811680.

The previous prime is 19902709230461. The next prime is 19902709230517. The reversal of 19902709230492 is 29403290720991.

It is a super-2 number, since 2×19902709230492² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4331743 + ... + 7653065.

It is an arithmetic number, because the mean of its divisors is an integer number (709133673024).

Almost surely, 2^{19902709230492} is an apocalyptic number.

19902709230492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19902709230492 is an abundant number, since it is smaller than the sum of its proper divisors (31154915227236).

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

19902709230492 is a wasteful number, since it uses less digits than its factorization.

19902709230492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325479 (or 3325466 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 57.

The spelling of 19902709230492 in words is "nineteen trillion, nine hundred two billion, seven hundred nine million, two hundred thirty thousand, four hundred ninety-two".