21901292926939 has 2 divisors, whose sum is σ = 21901292926940. Its totient is φ = 21901292926938.

The previous prime is 21901292926879. The next prime is 21901292926969. The reversal of 21901292926939 is 93962929210912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21901292926939 - 2¹⁷ = 21901292795867 is a prime.

It is not a weakly prime, because it can be changed into another prime (21901292926969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10950646463469 + 10950646463470.

It is an arithmetic number, because the mean of its divisors is an integer number (10950646463470).

Almost surely, 2^{21901292926939} is an apocalyptic number.

21901292926939 is a deficient number, since it is larger than the sum of its proper divisors (1).

21901292926939 is an equidigital number, since it uses as much as digits as its factorization.

21901292926939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17006112, while the sum is 64.

The spelling of 21901292926939 in words is "twenty-one trillion, nine hundred one billion, two hundred ninety-two million, nine hundred twenty-six thousand, nine hundred thirty-nine".