15992020380 has 48 divisors (see below), whose sum is σ = 51174466560. Its totient is φ = 3655318848.

The previous prime is 15992020361. The next prime is 15992020381. The reversal of 15992020380 is 8302029951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15992020381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19037700 + ... + 19038539.

It is an arithmetic number, because the mean of its divisors is an integer number (1066134720).

Almost surely, 2^15992020380 is an apocalyptic number.

15992020380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15992020380 is an abundant number, since it is smaller than the sum of its proper divisors (35182446180).

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

15992020380 is a wasteful number, since it uses less digits than its factorization.

15992020380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38076258 (or 38076256 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

It can be divided in two parts, 159920 and 20380, that added together give a triangular number (180300 = T₆₀₀).

The spelling of 15992020380 in words is "fifteen billion, nine hundred ninety-two million, twenty thousand, three hundred eighty".