21603070051 has 2 divisors, whose sum is σ = 21603070052. Its totient is φ = 21603070050.

The previous prime is 21603070033. The next prime is 21603070061. The reversal of 21603070051 is 15007030612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21603070051 - 2⁵ = 21603070019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21603069998 and 21603070025.

It is not a weakly prime, because it can be changed into another prime (21603070061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801535025 + 10801535026.

It is an arithmetic number, because the mean of its divisors is an integer number (10801535026).

Almost surely, 2^21603070051 is an apocalyptic number.

21603070051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21603070051 is an equidigital number, since it uses as much as digits as its factorization.

21603070051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The spelling of 21603070051 in words is "twenty-one billion, six hundred three million, seventy thousand, fifty-one".