21457222095 has 32 divisors (see below), whose sum is σ = 37196451072. Its totient is φ = 10520197632.

The previous prime is 21457222093. The next prime is 21457222097. The reversal of 21457222095 is 59022275412.

It is an interprime number because it is at equal distance from previous prime (21457222093) and next prime (21457222097).

It is not a de Polignac number, because 21457222095 - 2¹ = 21457222093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21457222093) 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, 967477 + ... + 989406.

It is an arithmetic number, because the mean of its divisors is an integer number (1162389096).

Almost surely, 2^21457222095 is an apocalyptic number.

21457222095 is a deficient number, since it is larger than the sum of its proper divisors (15739228977).

21457222095 is a wasteful number, since it uses less digits than its factorization.

21457222095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956951.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 21457222095 in words is "twenty-one billion, four hundred fifty-seven million, two hundred twenty-two thousand, ninety-five".