21250772467 has 8 divisors (see below), whose sum is σ = 22176272160. Its totient is φ = 20325402240.

The previous prime is 21250772423. The next prime is 21250772489. The reversal of 21250772467 is 76427705212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21250772467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21250775467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467467 + ... + 510907.

It is an arithmetic number, because the mean of its divisors is an integer number (2772034020).

Almost surely, 2^21250772467 is an apocalyptic number.

21250772467 is a deficient number, since it is larger than the sum of its proper divisors (925499693).

21250772467 is a wasteful number, since it uses less digits than its factorization.

21250772467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64733.

The product of its (nonzero) digits is 329280, while the sum is 43.

The spelling of 21250772467 in words is "twenty-one billion, two hundred fifty million, seven hundred seventy-two thousand, four hundred sixty-seven".