20323616406420 has 96 divisors (see below), whose sum is σ = 57759446384640. Its totient is φ = 5338913408640.

The previous prime is 20323616406377. The next prime is 20323616406421. The reversal of 20323616406420 is 2460461632302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323616406421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7428550 + ... + 9789309.

It is an arithmetic number, because the mean of its divisors is an integer number (601660899840).

Almost surely, 2^{20323616406420} is an apocalyptic number.

20323616406420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20323616406420 is an abundant number, since it is smaller than the sum of its proper divisors (37435829978220).

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

20323616406420 is a wasteful number, since it uses less digits than its factorization.

20323616406420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17218165 (or 17218163 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 20323616406420 in words is "twenty trillion, three hundred twenty-three billion, six hundred sixteen million, four hundred six thousand, four hundred twenty".