220021494 has 32 divisors (see below), whose sum is σ = 548626176. Its totient is φ = 57148320.

The previous prime is 220021469. The next prime is 220021507. The reversal of 220021494 is 494120022.

It is a Curzon number.

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, 237657 + ... + 238580.

It is an arithmetic number, because the mean of its divisors is an integer number (17144568).

Almost surely, 2^220021494 is an apocalyptic number.

220021494 is an abundant number, since it is smaller than the sum of its proper divisors (328604682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220021494 is a wasteful number, since it uses less digits than its factorization.

220021494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476260.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 220021494 is about 14833.1215190869. The cubic root of 220021494 is about 603.7007329198.

The spelling of 220021494 in words is "two hundred twenty million, twenty-one thousand, four hundred ninety-four".