20279874 has 24 divisors (see below), whose sum is σ = 42017040. Its totient is φ = 6525232.

The previous prime is 20279873. The next prime is 20279881. The reversal of 20279874 is 47897202.

It is a super-2 number, since 2×20279874² = 822546578911752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20279873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3037 + ... + 7055.

It is an arithmetic number, because the mean of its divisors is an integer number (1750710).

Almost surely, 2^20279874 is an apocalyptic number.

20279874 is an abundant number, since it is smaller than the sum of its proper divisors (21737166).

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

20279874 is a wasteful number, since it uses less digits than its factorization.

20279874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4082 (or 4053 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 20279874 is about 4503.3181100162. The cubic root of 20279874 is about 272.7020592651.

The spelling of 20279874 in words is "twenty million, two hundred seventy-nine thousand, eight hundred seventy-four".