20944153499 has 2 divisors, whose sum is σ = 20944153500. Its totient is φ = 20944153498.

The previous prime is 20944153393. The next prime is 20944153513. The reversal of 20944153499 is 99435144902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20944153499 - 2²⁸ = 20675718043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20944153099) 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, 10472076749 + 10472076750.

It is an arithmetic number, because the mean of its divisors is an integer number (10472076750).

Almost surely, 2^20944153499 is an apocalyptic number.

20944153499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20944153499 is an equidigital number, since it uses as much as digits as its factorization.

20944153499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 20944153499 in words is "twenty billion, nine hundred forty-four million, one hundred fifty-three thousand, four hundred ninety-nine".