21946614151 has 16 divisors (see below), whose sum is σ = 28971544320. Its totient is φ = 16095300480.

The previous prime is 21946614143. The next prime is 21946614167. The reversal of 21946614151 is 15141664912.

It is not a de Polignac number, because 21946614151 - 2³ = 21946614143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21946614181) 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, 8381661 + ... + 8384278.

It is an arithmetic number, because the mean of its divisors is an integer number (1810721520).

Almost surely, 2^21946614151 is an apocalyptic number.

21946614151 is a deficient number, since it is larger than the sum of its proper divisors (7024930169).

21946614151 is a wasteful number, since it uses less digits than its factorization.

21946614151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16765974.

The product of its digits is 51840, while the sum is 40.

The spelling of 21946614151 in words is "twenty-one billion, nine hundred forty-six million, six hundred fourteen thousand, one hundred fifty-one".