19957877280 has 384 divisors, whose sum is σ = 76826050560. Its totient is φ = 4798725120.

The previous prime is 19957877263. The next prime is 19957877309. The reversal of 19957877280 is 8277875991.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6033387 + ... + 6036693.

It is an arithmetic number, because the mean of its divisors is an integer number (200067840).

Almost surely, 2^19957877280 is an apocalyptic number.

19957877280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19957877280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38413025280).

19957877280 is an abundant number, since it is smaller than the sum of its proper divisors (56868173280).

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

19957877280 is a wasteful number, since it uses less digits than its factorization.

19957877280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469 (or 3455 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 63.

The spelling of 19957877280 in words is "nineteen billion, nine hundred fifty-seven million, eight hundred seventy-seven thousand, two hundred eighty".