19962738780 has 48 divisors (see below), whose sum is σ = 55954481184. Its totient is φ = 5317795840.

The previous prime is 19962738769. The next prime is 19962738799. The reversal of 19962738780 is 8783726991.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117381 + ... + 231740.

It is an arithmetic number, because the mean of its divisors is an integer number (1165718358).

Almost surely, 2^19962738780 is an apocalyptic number.

19962738780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19962738780 is an abundant number, since it is smaller than the sum of its proper divisors (35991742404).

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

19962738780 is a wasteful number, since it uses less digits than its factorization.

19962738780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350086 (or 350084 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 19962738780 in words is "nineteen billion, nine hundred sixty-two million, seven hundred thirty-eight thousand, seven hundred eighty".