20281874 has 8 divisors (see below), whose sum is σ = 31404288. Its totient is φ = 9813780.

The previous prime is 20281861. The next prime is 20281879. The reversal of 20281874 is 47818202.

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

It is a super-2 number, since 2×20281874² = 822708825903752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20281874.

It is not an unprimeable number, because it can be changed into a prime (20281879) 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, 163502 + ... + 163625.

It is an arithmetic number, because the mean of its divisors is an integer number (3925536).

Almost surely, 2^20281874 is an apocalyptic number.

20281874 is a deficient number, since it is larger than the sum of its proper divisors (11122414).

20281874 is a wasteful number, since it uses less digits than its factorization.

20281874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327160.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 20281874 is about 4503.5401630273. The cubic root of 20281874 is about 272.7110235908.

The spelling of 20281874 in words is "twenty million, two hundred eighty-one thousand, eight hundred seventy-four".