21036153629 has 2 divisors, whose sum is σ = 21036153630. Its totient is φ = 21036153628.

The previous prime is 21036153599. The next prime is 21036153647. The reversal of 21036153629 is 92635163012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19845765625 + 1190388004 = 140875^2 + 34502^2 .

It is a cyclic number.

It is not a de Polignac number, because 21036153629 - 2²⁸ = 20767718173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21036153592 and 21036153601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21036153689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10518076814 + 10518076815.

It is an arithmetic number, because the mean of its divisors is an integer number (10518076815).

Almost surely, 2^21036153629 is an apocalyptic number.

It is an amenable number.

21036153629 is a deficient number, since it is larger than the sum of its proper divisors (1).

21036153629 is an equidigital number, since it uses as much as digits as its factorization.

21036153629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 38.

The spelling of 21036153629 in words is "twenty-one billion, thirty-six million, one hundred fifty-three thousand, six hundred twenty-nine".