19797059280 has 80 divisors (see below), whose sum is σ = 61387320960. Its totient is φ = 5277801984.

The previous prime is 19797059279. The next prime is 19797059333. The reversal of 19797059280 is 8295079791.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×19797059280² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19797059280.

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, 1133494 + ... + 1150826.

It is an arithmetic number, because the mean of its divisors is an integer number (767341512).

Almost surely, 2^19797059280 is an apocalyptic number.

19797059280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19797059280 is an abundant number, since it is smaller than the sum of its proper divisors (41590261680).

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

19797059280 is a wasteful number, since it uses less digits than its factorization.

19797059280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22108 (or 22102 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 57.

The spelling of 19797059280 in words is "nineteen billion, seven hundred ninety-seven million, fifty-nine thousand, two hundred eighty".