20723682 has 32 divisors (see below), whose sum is σ = 47505024. Its totient is φ = 5904000.

The previous prime is 20723671. The next prime is 20723683. The reversal of 20723682 is 28632702.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20723683) 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, 24832 + ... + 25652.

It is an arithmetic number, because the mean of its divisors is an integer number (1484532).

Almost surely, 2^20723682 is an apocalyptic number.

20723682 is an abundant number, since it is smaller than the sum of its proper divisors (26781342).

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

20723682 is a wasteful number, since it uses less digits than its factorization.

20723682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20723682 is about 4552.3270972108. The cubic root of 20723682 is about 274.6770070127.

The spelling of 20723682 in words is "twenty million, seven hundred twenty-three thousand, six hundred eighty-two".