21986499711 has 16 divisors (see below), whose sum is σ = 32028923520. Its totient is φ = 13304917920.

The previous prime is 21986499709. The next prime is 21986499739. The reversal of 21986499711 is 11799468912.

It is not a de Polignac number, because 21986499711 - 2¹ = 21986499709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21986499791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483760 + ... + 527253.

It is an arithmetic number, because the mean of its divisors is an integer number (2001807720).

Almost surely, 2^21986499711 is an apocalyptic number.

21986499711 is a deficient number, since it is larger than the sum of its proper divisors (10042423809).

21986499711 is a wasteful number, since it uses less digits than its factorization.

21986499711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011686.

The product of its digits is 1959552, while the sum is 57.

The spelling of 21986499711 in words is "twenty-one billion, nine hundred eighty-six million, four hundred ninety-nine thousand, seven hundred eleven".