21353324629 has 32 divisors (see below), whose sum is σ = 27708692480. Its totient is φ = 15980006592.

The previous prime is 21353324617. The next prime is 21353324639. The reversal of 21353324629 is 92642335312.

It is a cyclic number.

It is not a de Polignac number, because 21353324629 - 2¹⁷ = 21353193557 is a prime.

It is a super-2 number, since 2×21353324629² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21353324591 and 21353324600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21353324639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1102144 + ... + 1121350.

It is an arithmetic number, because the mean of its divisors is an integer number (865896640).

Almost surely, 2^21353324629 is an apocalyptic number.

It is an amenable number.

21353324629 is a deficient number, since it is larger than the sum of its proper divisors (6355367851).

21353324629 is a wasteful number, since it uses less digits than its factorization.

21353324629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19889.

The product of its digits is 233280, while the sum is 40.

The spelling of 21353324629 in words is "twenty-one billion, three hundred fifty-three million, three hundred twenty-four thousand, six hundred twenty-nine".