21527208494 has 24 divisors (see below), whose sum is σ = 37581050304. Its totient is φ = 9209499200.

The previous prime is 21527208467. The next prime is 21527208497. The reversal of 21527208494 is 49480272512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21527208497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2612222 + ... + 2620449.

It is an arithmetic number, because the mean of its divisors is an integer number (1565877096).

Almost surely, 2^21527208494 is an apocalyptic number.

21527208494 is a deficient number, since it is larger than the sum of its proper divisors (16053841810).

21527208494 is a wasteful number, since it uses less digits than its factorization.

21527208494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5232712 (or 5232701 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 21527208494 in words is "twenty-one billion, five hundred twenty-seven million, two hundred eight thousand, four hundred ninety-four".