21946162377 has 8 divisors (see below), whose sum is σ = 29408593600. Its totient is φ = 14557253040.

The previous prime is 21946162369. The next prime is 21946162423. The reversal of 21946162377 is 77326164912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21946162377 - 2³ = 21946162369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21946162307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18379774 + ... + 18380967.

It is an arithmetic number, because the mean of its divisors is an integer number (3676074200).

Almost surely, 2^21946162377 is an apocalyptic number.

It is an amenable number.

21946162377 is a deficient number, since it is larger than the sum of its proper divisors (7462431223).

21946162377 is a wasteful number, since it uses less digits than its factorization.

21946162377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36760943.

The product of its digits is 762048, while the sum is 48.

The spelling of 21946162377 in words is "twenty-one billion, nine hundred forty-six million, one hundred sixty-two thousand, three hundred seventy-seven".