20021874 has 8 divisors (see below), whose sum is σ = 40043760. Its totient is φ = 6673956.

The previous prime is 20021873. The next prime is 20021879. The reversal of 20021874 is 47812002.

It is a sphenic number, since it is the product of 3 distinct primes.

20021874 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20021873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1668484 + ... + 1668495.

It is an arithmetic number, because the mean of its divisors is an integer number (5005470).

Almost surely, 2^20021874 is an apocalyptic number.

20021874 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20021874 is a wasteful number, since it uses less digits than its factorization.

20021874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336984.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20021874 is about 4474.5808742272. The cubic root of 20021874 is about 271.5406842226.

Adding to 20021874 its reverse (47812002), we get a palindrome (67833876).

The spelling of 20021874 in words is "twenty million, twenty-one thousand, eight hundred seventy-four".