20273842 has 16 divisors (see below), whose sum is σ = 31593240. Its totient is φ = 9745792.

The previous prime is 20273821. The next prime is 20273863. The reversal of 20273842 is 24837202.

It is an interprime number because it is at equal distance from previous prime (20273821) and next prime (20273863).

It can be written as a sum of positive squares in 4 ways, for example, as 20079361 + 194481 = 4481^2 + 441^2 .

It is a super-2 number, since 2×20273842² = 822057338881928, 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 20273842.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16398 + ... + 17590.

Almost surely, 2^20273842 is an apocalyptic number.

20273842 is a deficient number, since it is larger than the sum of its proper divisors (11319398).

20273842 is a wasteful number, since it uses less digits than its factorization.

20273842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20273842 is about 4502.6483318154. The cubic root of 20273842 is about 272.6750192888.

It can be divided in two parts, 20273 and 842, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20273842 in words is "twenty million, two hundred seventy-three thousand, eight hundred forty-two".