20905522 has 8 divisors (see below), whose sum is σ = 34209072. Its totient is φ = 9502500.

The previous prime is 20905519. The next prime is 20905559. The reversal of 20905522 is 22550902.

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

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, 475104 + ... + 475147.

It is an arithmetic number, because the mean of its divisors is an integer number (4276134).

Almost surely, 2^20905522 is an apocalyptic number.

20905522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20905522 is a deficient number, since it is larger than the sum of its proper divisors (13303550).

20905522 is a wasteful number, since it uses less digits than its factorization.

20905522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950264.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 20905522 is about 4572.2556796400. The cubic root of 20905522 is about 275.4780533306.

The spelling of 20905522 in words is "twenty million, nine hundred five thousand, five hundred twenty-two".