21490688086 has 8 divisors (see below), whose sum is σ = 36841179600. Its totient is φ = 9210294888.

The previous prime is 21490688069. The next prime is 21490688117. The reversal of 21490688086 is 68088609412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767524561 + ... + 767524588.

It is an arithmetic number, because the mean of its divisors is an integer number (4605147450).

Almost surely, 2^21490688086 is an apocalyptic number.

21490688086 is a deficient number, since it is larger than the sum of its proper divisors (15350491514).

21490688086 is a wasteful number, since it uses less digits than its factorization.

21490688086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535049158.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 21490688086 in words is "twenty-one billion, four hundred ninety million, six hundred eighty-eight thousand, eighty-six".