21048400886 has 4 divisors (see below), whose sum is σ = 31572601332. Its totient is φ = 10524200442.

The previous prime is 21048400727. The next prime is 21048400903. The reversal of 21048400886 is 68800484012.

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, 5262100220 + ... + 5262100223.

It is an arithmetic number, because the mean of its divisors is an integer number (7893150333).

Almost surely, 2^21048400886 is an apocalyptic number.

21048400886 is a deficient number, since it is larger than the sum of its proper divisors (10524200446).

21048400886 is a wasteful number, since it uses less digits than its factorization.

21048400886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10524200445.

The product of its (nonzero) digits is 98304, while the sum is 41.

Adding to 21048400886 its reverse (68800484012), we get a palindrome (89848884898).

The spelling of 21048400886 in words is "twenty-one billion, forty-eight million, four hundred thousand, eight hundred eighty-six".