20912670 has 24 divisors (see below), whose sum is σ = 54373176. Its totient is φ = 5576688.

The previous prime is 20912653. The next prime is 20912677. The reversal of 20912670 is 7621902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20912677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116092 + ... + 116271.

It is an arithmetic number, because the mean of its divisors is an integer number (2265549).

Almost surely, 2^20912670 is an apocalyptic number.

20912670 is an abundant number, since it is smaller than the sum of its proper divisors (33460506).

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

20912670 is a wasteful number, since it uses less digits than its factorization.

20912670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232376 (or 232373 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20912670 is about 4573.0372839066. The cubic root of 20912670 is about 275.5094468342.

It can be divided in two parts, 2091 and 2670, that added together give a square (4761 = 69²).

The spelling of 20912670 in words is "twenty million, nine hundred twelve thousand, six hundred seventy".