22140421400 has 48 divisors (see below), whose sum is σ = 52447759200. Its totient is φ = 8689066880.

The previous prime is 22140421351. The next prime is 22140421409. The reversal of 22140421400 is 412404122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22140421409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1033760 + ... + 1054959.

It is an arithmetic number, because the mean of its divisors is an integer number (1092661650).

Almost surely, 2^22140421400 is an apocalyptic number.

22140421400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22140421400 is an abundant number, since it is smaller than the sum of its proper divisors (30307337800).

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

22140421400 is a wasteful number, since it uses less digits than its factorization.

22140421400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088788 (or 2088779 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22140421400 its reverse (412404122), we get a palindrome (22552825522).

The spelling of 22140421400 in words is "twenty-two billion, one hundred forty million, four hundred twenty-one thousand, four hundred".