21054652207 has 2 divisors, whose sum is σ = 21054652208. Its totient is φ = 21054652206.

The previous prime is 21054652183. The next prime is 21054652243. The reversal of 21054652207 is 70225645012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21054652207 - 2⁷ = 21054652079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21054652907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10527326103 + 10527326104.

It is an arithmetic number, because the mean of its divisors is an integer number (10527326104).

Almost surely, 2^21054652207 is an apocalyptic number.

21054652207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21054652207 is an equidigital number, since it uses as much as digits as its factorization.

21054652207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 21054652207 in words is "twenty-one billion, fifty-four million, six hundred fifty-two thousand, two hundred seven".