20545212 has 24 divisors (see below), whose sum is σ = 49235536. Its totient is φ = 6663168.

The previous prime is 20545207. The next prime is 20545237. The reversal of 20545212 is 21254502.

It is a happy number.

It is a super-2 number, since 2×20545212² = 844211472249888, which contains 22 as substring.

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, 22693 + ... + 23580.

Almost surely, 2^20545212 is an apocalyptic number.

It is an amenable number.

20545212 is an abundant number, since it is smaller than the sum of its proper divisors (28690324).

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

20545212 is a wasteful number, since it uses less digits than its factorization.

20545212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46317 (or 46315 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20545212 is about 4532.6826493810. The cubic root of 20545212 is about 273.8862368938.

Adding to 20545212 its reverse (21254502), we get a palindrome (41799714).

The spelling of 20545212 in words is "twenty million, five hundred forty-five thousand, two hundred twelve".