21380036147744 has 48 divisors (see below), whose sum is σ = 43194667642560. Its totient is φ = 10412863968000.

The previous prime is 21380036147663. The next prime is 21380036147779. The reversal of 21380036147744 is 44774163008312.

It is a junction number, because it is equal to n+sod(n) for n = 21380036147692 and 21380036147701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45110132 + ... + 45581619.

It is an arithmetic number, because the mean of its divisors is an integer number (899888909220).

Almost surely, 2^{21380036147744} is an apocalyptic number.

It is an amenable number.

21380036147744 is an abundant number, since it is smaller than the sum of its proper divisors (21814631494816).

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

21380036147744 is a wasteful number, since it uses less digits than its factorization.

21380036147744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90691953 (or 90691945 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 50.

The spelling of 21380036147744 in words is "twenty-one trillion, three hundred eighty billion, thirty-six million, one hundred forty-seven thousand, seven hundred forty-four".