20355572 has 12 divisors (see below), whose sum is σ = 35738976. Its totient is φ = 10144440.

The previous prime is 20355571. The next prime is 20355607. The reversal of 20355572 is 27555302.

It is a super-2 number, since 2×20355572² = 828698622894368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20355571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6938 + ... + 9425.

It is an arithmetic number, because the mean of its divisors is an integer number (2978248).

Almost surely, 2^20355572 is an apocalyptic number.

It is an amenable number.

20355572 is a deficient number, since it is larger than the sum of its proper divisors (15383404).

20355572 is a wasteful number, since it uses less digits than its factorization.

20355572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16678 (or 16676 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 20355572 is about 4511.7149732668. The cubic root of 20355572 is about 273.0409398902.

The spelling of 20355572 in words is "twenty million, three hundred fifty-five thousand, five hundred seventy-two".