21772913367 has 16 divisors (see below), whose sum is σ = 29154166272. Its totient is φ = 14453601120.

The previous prime is 21772913341. The next prime is 21772913381. The reversal of 21772913367 is 76331927712.

It is not a de Polignac number, because 21772913367 - 2¹² = 21772909271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21772913317) 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, 657358 + ... + 689684.

It is an arithmetic number, because the mean of its divisors is an integer number (1822135392).

Almost surely, 2^21772913367 is an apocalyptic number.

21772913367 is a deficient number, since it is larger than the sum of its proper divisors (7381252905).

21772913367 is a wasteful number, since it uses less digits than its factorization.

21772913367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33278.

The product of its digits is 666792, while the sum is 48.

The spelling of 21772913367 in words is "twenty-one billion, seven hundred seventy-two million, nine hundred thirteen thousand, three hundred sixty-seven".