21029596423649 has 8 divisors (see below), whose sum is σ = 22941416863200. Its totient is φ = 19117782475200.

The previous prime is 21029596423609. The next prime is 21029596423679. The reversal of 21029596423649 is 94632469592012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21029596423649 - 2²⁰ = 21029595375073 is a prime.

It is a super-2 number, since 2×21029596423649² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21029596423591 and 21029596423600.

It is not an unprimeable number, because it can be changed into a prime (21029596423609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7270169 + ... + 9742409.

It is an arithmetic number, because the mean of its divisors is an integer number (2867677107900).

Almost surely, 2^{21029596423649} is an apocalyptic number.

It is an amenable number.

21029596423649 is a deficient number, since it is larger than the sum of its proper divisors (1911820439551).

21029596423649 is a wasteful number, since it uses less digits than its factorization.

21029596423649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3245551.

The product of its (nonzero) digits is 50388480, while the sum is 62.

The spelling of 21029596423649 in words is "twenty-one trillion, twenty-nine billion, five hundred ninety-six million, four hundred twenty-three thousand, six hundred forty-nine".