20070812 has 48 divisors (see below), whose sum is σ = 39880512. Its totient is φ = 8785920.

The previous prime is 20070803. The next prime is 20070823. The reversal of 20070812 is 21807002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63968 + ... + 64280.

It is an arithmetic number, because the mean of its divisors is an integer number (830844).

Almost surely, 2^20070812 is an apocalyptic number.

It is an amenable number.

20070812 is a deficient number, since it is larger than the sum of its proper divisors (19809700).

20070812 is a wasteful number, since it uses less digits than its factorization.

20070812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 20070812 is about 4480.0459819069. The cubic root of 20070812 is about 271.7617398849.

Adding to 20070812 its reverse (21807002), we get a palindrome (41877814).

The spelling of 20070812 in words is "twenty million, seventy thousand, eight hundred twelve".