21100432933 has 2 divisors, whose sum is σ = 21100432934. Its totient is φ = 21100432932.

The previous prime is 21100432909. The next prime is 21100432943. The reversal of 21100432933 is 33923400112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18011518849 + 3088914084 = 134207^2 + 55578^2 .

It is a cyclic number.

It is not a de Polignac number, because 21100432933 - 2¹⁷ = 21100301861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100432943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550216466 + 10550216467.

It is an arithmetic number, because the mean of its divisors is an integer number (10550216467).

Almost surely, 2^21100432933 is an apocalyptic number.

It is an amenable number.

21100432933 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100432933 is an equidigital number, since it uses as much as digits as its factorization.

21100432933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 21100432933 in words is "twenty-one billion, one hundred million, four hundred thirty-two thousand, nine hundred thirty-three".