22154166421 has 32 divisors (see below), whose sum is σ = 24906792960. Its totient is φ = 19605079296.

The previous prime is 22154166401. The next prime is 22154166427. The reversal of 22154166421 is 12466145122.

It is not a de Polignac number, because 22154166421 - 2²³ = 22145777813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22154166427) 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, 12466285 + ... + 12468061.

It is an arithmetic number, because the mean of its divisors is an integer number (778337280).

Almost surely, 2^22154166421 is an apocalyptic number.

It is an amenable number.

22154166421 is a deficient number, since it is larger than the sum of its proper divisors (2752626539).

22154166421 is a wasteful number, since it uses less digits than its factorization.

22154166421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473.

The product of its digits is 23040, while the sum is 34.

The spelling of 22154166421 in words is "twenty-two billion, one hundred fifty-four million, one hundred sixty-six thousand, four hundred twenty-one".