20213132 has 24 divisors (see below), whose sum is σ = 36271872. Its totient is φ = 9853200.

The previous prime is 20213107. The next prime is 20213183. The reversal of 20213132 is 23131202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28907 + ... + 29597.

It is an arithmetic number, because the mean of its divisors is an integer number (1511328).

Almost surely, 2^20213132 is an apocalyptic number.

It is an amenable number.

20213132 is a deficient number, since it is larger than the sum of its proper divisors (16058740).

20213132 is a wasteful number, since it uses less digits than its factorization.

20213132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20213132 is about 4495.9016893166. The cubic root of 20213132 is about 272.4025721339.

Adding to 20213132 its reverse (23131202), we get a palindrome (43344334).

The spelling of 20213132 in words is "twenty million, two hundred thirteen thousand, one hundred thirty-two".