21523490246 has 16 divisors (see below), whose sum is σ = 32346782160. Its totient is φ = 10741248000.

The previous prime is 21523490243. The next prime is 21523490249. The reversal of 21523490246 is 64209432512.

It is an interprime number because it is at equal distance from previous prime (21523490243) and next prime (21523490249).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21523490243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3458930 + ... + 3465146.

It is an arithmetic number, because the mean of its divisors is an integer number (2021673885).

Almost surely, 2^21523490246 is an apocalyptic number.

21523490246 is a deficient number, since it is larger than the sum of its proper divisors (10823291914).

21523490246 is a wasteful number, since it uses less digits than its factorization.

21523490246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9239.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 21523490246 in words is "twenty-one billion, five hundred twenty-three million, four hundred ninety thousand, two hundred forty-six".