21458629502 has 4 divisors (see below), whose sum is σ = 32187944256. Its totient is φ = 10729314750.

The previous prime is 21458629501. The next prime is 21458629513. The reversal of 21458629502 is 20592685412.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21458629501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5364657374 + ... + 5364657377.

It is an arithmetic number, because the mean of its divisors is an integer number (8046986064).

Almost surely, 2^21458629502 is an apocalyptic number.

21458629502 is a deficient number, since it is larger than the sum of its proper divisors (10729314754).

21458629502 is a wasteful number, since it uses less digits than its factorization.

21458629502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10729314753.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 21458629502 in words is "twenty-one billion, four hundred fifty-eight million, six hundred twenty-nine thousand, five hundred two".