21354462607 has 2 divisors, whose sum is σ = 21354462608. Its totient is φ = 21354462606.

The previous prime is 21354462589. The next prime is 21354462611. The reversal of 21354462607 is 70626445312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21354462607 - 2¹¹ = 21354460559 is a prime.

It is a super-2 number, since 2×21354462607² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21354462607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21354462667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677231303 + 10677231304.

It is an arithmetic number, because the mean of its divisors is an integer number (10677231304).

Almost surely, 2^21354462607 is an apocalyptic number.

21354462607 is a deficient number, since it is larger than the sum of its proper divisors (1).

21354462607 is an equidigital number, since it uses as much as digits as its factorization.

21354462607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 21354462607 in words is "twenty-one billion, three hundred fifty-four million, four hundred sixty-two thousand, six hundred seven".