21532987214 has 16 divisors (see below), whose sum is σ = 32344369200. Its totient is φ = 10751544384.

The previous prime is 21532987187. The next prime is 21532987241. The reversal of 21532987214 is 41278923512.

It is an interprime number because it is at equal distance from previous prime (21532987187) and next prime (21532987241).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7251122 + ... + 7254090.

It is an arithmetic number, because the mean of its divisors is an integer number (2021523075).

Almost surely, 2^21532987214 is an apocalyptic number.

21532987214 is a deficient number, since it is larger than the sum of its proper divisors (10811381986).

21532987214 is a wasteful number, since it uses less digits than its factorization.

21532987214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6787.

The product of its digits is 241920, while the sum is 44.

The spelling of 21532987214 in words is "twenty-one billion, five hundred thirty-two million, nine hundred eighty-seven thousand, two hundred fourteen".