21526377358 has 4 divisors (see below), whose sum is σ = 32289566040. Its totient is φ = 10763188678.

The previous prime is 21526377343. The next prime is 21526377391. The reversal of 21526377358 is 85377362512.

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, 5381594338 + ... + 5381594341.

It is an arithmetic number, because the mean of its divisors is an integer number (8072391510).

Almost surely, 2^21526377358 is an apocalyptic number.

21526377358 is a deficient number, since it is larger than the sum of its proper divisors (10763188682).

21526377358 is a wasteful number, since it uses less digits than its factorization.

21526377358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10763188681.

The product of its digits is 2116800, while the sum is 49.

The spelling of 21526377358 in words is "twenty-one billion, five hundred twenty-six million, three hundred seventy-seven thousand, three hundred fifty-eight".