21032402407 has 2 divisors, whose sum is σ = 21032402408. Its totient is φ = 21032402406.

The previous prime is 21032402399. The next prime is 21032402441. The reversal of 21032402407 is 70420423012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21032402407 - 2³ = 21032402399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21032408407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516201203 + 10516201204.

It is an arithmetic number, because the mean of its divisors is an integer number (10516201204).

Almost surely, 2^21032402407 is an apocalyptic number.

21032402407 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032402407 is an equidigital number, since it uses as much as digits as its factorization.

21032402407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

Adding to 21032402407 its reverse (70420423012), we get a palindrome (91452825419).

The spelling of 21032402407 in words is "twenty-one billion, thirty-two million, four hundred two thousand, four hundred seven".