20400337356740 has 48 divisors (see below), whose sum is σ = 46758375728064. Its totient is φ = 7414644585600.

The previous prime is 20400337356713. The next prime is 20400337356761. The reversal of 20400337356740 is 4765373300402.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 20400337356691 and 20400337356700.

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, 22427471 + ... + 23319350.

It is an arithmetic number, because the mean of its divisors is an integer number (974132827668).

Almost surely, 2^{20400337356740} is an apocalyptic number.

20400337356740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20400337356740 is an abundant number, since it is smaller than the sum of its proper divisors (26358038371324).

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

20400337356740 is a wasteful number, since it uses less digits than its factorization.

20400337356740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45748868 (or 45748866 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 44.

The spelling of 20400337356740 in words is "twenty trillion, four hundred billion, three hundred thirty-seven million, three hundred fifty-six thousand, seven hundred forty".