21400014222420 has 96 divisors (see below), whose sum is σ = 61533149368320. Its totient is φ = 5555075809920.

The previous prime is 21400014222403. The next prime is 21400014222449. The reversal of 21400014222420 is 2422241000412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31457622 + ... + 32130701.

It is an arithmetic number, because the mean of its divisors is an integer number (640970305920).

Almost surely, 2^{21400014222420} is an apocalyptic number.

21400014222420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21400014222420 is an abundant number, since it is smaller than the sum of its proper divisors (40133135145900).

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

21400014222420 is a wasteful number, since it uses less digits than its factorization.

21400014222420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63588485 (or 63588483 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21400014222420 its reverse (2422241000412), we get a palindrome (23822255222832).

The spelling of 21400014222420 in words is "twenty-one trillion, four hundred billion, fourteen million, two hundred twenty-two thousand, four hundred twenty".