21406632314494 has 32 divisors (see below), whose sum is σ = 37968345870336. Its totient is φ = 8857822469760.

The previous prime is 21406632314437. The next prime is 21406632314519. The reversal of 21406632314494 is 49441323660412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56768242 + ... + 57144085.

It is an arithmetic number, because the mean of its divisors is an integer number (1186510808448).

Almost surely, 2^{21406632314494} is an apocalyptic number.

21406632314494 is a deficient number, since it is larger than the sum of its proper divisors (16561713555842).

21406632314494 is a wasteful number, since it uses less digits than its factorization.

21406632314494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113912800.

The product of its (nonzero) digits is 2985984, while the sum is 49.

The spelling of 21406632314494 in words is "twenty-one trillion, four hundred six billion, six hundred thirty-two million, three hundred fourteen thousand, four hundred ninety-four".