21292337629 has 2 divisors, whose sum is σ = 21292337630. Its totient is φ = 21292337628.

The previous prime is 21292337621. The next prime is 21292337659. The reversal of 21292337629 is 92673329212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18125236900 + 3167100729 = 134630^2 + 56277^2 .

It is a cyclic number.

It is not a de Polignac number, because 21292337629 - 2³ = 21292337621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21292337621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10646168814 + 10646168815.

It is an arithmetic number, because the mean of its divisors is an integer number (10646168815).

Almost surely, 2^21292337629 is an apocalyptic number.

It is an amenable number.

21292337629 is a deficient number, since it is larger than the sum of its proper divisors (1).

21292337629 is an equidigital number, since it uses as much as digits as its factorization.

21292337629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 46.

The spelling of 21292337629 in words is "twenty-one billion, two hundred ninety-two million, three hundred thirty-seven thousand, six hundred twenty-nine".