19902713 has 8 divisors (see below), whose sum is σ = 20655360. Its totient is φ = 19157040.

The previous prime is 19902689. The next prime is 19902737. The reversal of 19902713 is 31720991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19902689) and next prime (19902737).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19902713 - 2⁸ = 19902457 is a prime.

It is a super-2 number, since 2×19902713² = 792235969520738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 19902713.

It is not an unprimeable number, because it can be changed into a prime (19902763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4478 + ... + 7736.

It is an arithmetic number, because the mean of its divisors is an integer number (2581920).

Almost surely, 2^19902713 is an apocalyptic number.

It is an amenable number.

19902713 is a deficient number, since it is larger than the sum of its proper divisors (752647).

19902713 is a wasteful number, since it uses less digits than its factorization.

19902713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 19902713 is about 4461.2456780590. The cubic root of 19902713 is about 271.0009168326. Note that the first 3 decimals are identical.

The spelling of 19902713 in words is "nineteen million, nine hundred two thousand, seven hundred thirteen".