20203612 has 72 divisors (see below), whose sum is σ = 44315600. Its totient is φ = 8030880.

The previous prime is 20203571. The next prime is 20203621. The reversal of 20203612 is 21630202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1063339 + ... + 1063357.

Almost surely, 2^20203612 is an apocalyptic number.

20203612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20203612 is an abundant number, since it is smaller than the sum of its proper divisors (24111988).

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

20203612 is a wasteful number, since it uses less digits than its factorization.

20203612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20203612 is about 4494.8428226135. The cubic root of 20203612 is about 272.3597999447.

Adding to 20203612 its reverse (21630202), we get a palindrome (41833814).

The spelling of 20203612 in words is "twenty million, two hundred three thousand, six hundred twelve".