21367101654427 has 16 divisors (see below), whose sum is σ = 21610188319104. Its totient is φ = 21125250328000.

The previous prime is 21367101654413. The next prime is 21367101654449. The reversal of 21367101654427 is 72445610176312.

It is a cyclic number.

It is not a de Polignac number, because 21367101654427 - 2⁷ = 21367101654299 is a prime.

It is a super-2 number, since 2×21367101654427² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21367101654407) 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, 256567848 + ... + 256651114.

It is an arithmetic number, because the mean of its divisors is an integer number (1350636769944).

Almost surely, 2^{21367101654427} is an apocalyptic number.

21367101654427 is a deficient number, since it is larger than the sum of its proper divisors (243086664677).

21367101654427 is a wasteful number, since it uses less digits than its factorization.

21367101654427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90650.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 21367101654427 in words is "twenty-one trillion, three hundred sixty-seven billion, one hundred one million, six hundred fifty-four thousand, four hundred twenty-seven".