21923153767 has 2 divisors, whose sum is σ = 21923153768. Its totient is φ = 21923153766.

The previous prime is 21923153741. The next prime is 21923153839. The reversal of 21923153767 is 76735132912.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21923153767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21923159767) 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 as a sum of consecutive naturals, namely, 10961576883 + 10961576884.

It is an arithmetic number, because the mean of its divisors is an integer number (10961576884).

Almost surely, 2^21923153767 is an apocalyptic number.

21923153767 is a deficient number, since it is larger than the sum of its proper divisors (1).

21923153767 is an equidigital number, since it uses as much as digits as its factorization.

21923153767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 46.

The spelling of 21923153767 in words is "twenty-one billion, nine hundred twenty-three million, one hundred fifty-three thousand, seven hundred sixty-seven".