20711670 has 32 divisors (see below), whose sum is σ = 56809728. Its totient is φ = 4734048.

The previous prime is 20711659. The next prime is 20711671. The reversal of 20711670 is 7611702.

It is a self number, because there is not a number n which added to its sum of digits gives 20711670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20711671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49104 + ... + 49523.

It is an arithmetic number, because the mean of its divisors is an integer number (1775304).

Almost surely, 2^20711670 is an apocalyptic number.

20711670 is an abundant number, since it is smaller than the sum of its proper divisors (36098058).

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

20711670 is a wasteful number, since it uses less digits than its factorization.

20711670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98644.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 20711670 is about 4551.0075807452. The cubic root of 20711670 is about 274.6239267108.

It can be divided in two parts, 2071 and 1670, that added together give a triangular number (3741 = T₈₆).

The spelling of 20711670 in words is "twenty million, seven hundred eleven thousand, six hundred seventy".