20512070 has 16 divisors (see below), whose sum is σ = 37039248. Its totient is φ = 8178720.

The previous prime is 20512031. The next prime is 20512073. The reversal of 20512070 is 7021502.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212 + ... + 6408.

It is an arithmetic number, because the mean of its divisors is an integer number (2314953).

Almost surely, 2^20512070 is an apocalyptic number.

20512070 is a deficient number, since it is larger than the sum of its proper divisors (16527178).

20512070 is a wasteful number, since it uses less digits than its factorization.

20512070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6535.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 20512070 is about 4529.0252814485. The cubic root of 20512070 is about 273.7388867002.

Adding to 20512070 its reverse (7021502), we get a palindrome (27533572).

The spelling of 20512070 in words is "twenty million, five hundred twelve thousand, seventy".