20523982 has 16 divisors (see below), whose sum is σ = 31249872. Its totient is φ = 10108800.

The previous prime is 20523973. The next prime is 20523983. The reversal of 20523982 is 28932502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523983) 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, 50982 + ... + 51382.

It is an arithmetic number, because the mean of its divisors is an integer number (1953117).

Almost surely, 2^20523982 is an apocalyptic number.

20523982 is a deficient number, since it is larger than the sum of its proper divisors (10725890).

20523982 is a wasteful number, since it uses less digits than its factorization.

20523982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20523982 is about 4530.3401638288. The cubic root of 20523982 is about 273.7918660210.

The spelling of 20523982 in words is "twenty million, five hundred twenty-three thousand, nine hundred eighty-two".