21007903159 has 2 divisors, whose sum is σ = 21007903160. Its totient is φ = 21007903158.

The previous prime is 21007903129. The next prime is 21007903171. The reversal of 21007903159 is 95130970012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21007903159 - 2²⁷ = 20873685431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21007903129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10503951579 + 10503951580.

It is an arithmetic number, because the mean of its divisors is an integer number (10503951580).

Almost surely, 2^21007903159 is an apocalyptic number.

21007903159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21007903159 is an equidigital number, since it uses as much as digits as its factorization.

21007903159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 37.

The spelling of 21007903159 in words is "twenty-one billion, seven million, nine hundred three thousand, one hundred fifty-nine".