21245537246 has 4 divisors (see below), whose sum is σ = 31868305872. Its totient is φ = 10622768622.

The previous prime is 21245537237. The next prime is 21245537267. The reversal of 21245537246 is 64273554212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5311384310 + ... + 5311384313.

It is an arithmetic number, because the mean of its divisors is an integer number (7967076468).

Almost surely, 2^21245537246 is an apocalyptic number.

21245537246 is a deficient number, since it is larger than the sum of its proper divisors (10622768626).

21245537246 is a wasteful number, since it uses less digits than its factorization.

21245537246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10622768625.

The product of its digits is 403200, while the sum is 41.

The spelling of 21245537246 in words is "twenty-one billion, two hundred forty-five million, five hundred thirty-seven thousand, two hundred forty-six".