21887407167 has 16 divisors (see below), whose sum is σ = 29881513728. Its totient is φ = 14242898880.

The previous prime is 21887407151. The next prime is 21887407189. The reversal of 21887407167 is 76170478812.

It is not a de Polignac number, because 21887407167 - 2⁴ = 21887407151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21887407117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144067 + ... + 254027.

It is an arithmetic number, because the mean of its divisors is an integer number (1867594608).

Almost surely, 2^21887407167 is an apocalyptic number.

21887407167 is a deficient number, since it is larger than the sum of its proper divisors (7994106561).

21887407167 is a wasteful number, since it uses less digits than its factorization.

21887407167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111550.

The product of its (nonzero) digits is 1053696, while the sum is 51.

The spelling of 21887407167 in words is "twenty-one billion, eight hundred eighty-seven million, four hundred seven thousand, one hundred sixty-seven".