20873402 has 16 divisors (see below), whose sum is σ = 35080992. Its totient is φ = 9231120.

The previous prime is 20873393. The next prime is 20873423. The reversal of 20873402 is 20437802.

It is a super-2 number, since 2×20873402² = 871397822107208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12008 + ... + 13635.

It is an arithmetic number, because the mean of its divisors is an integer number (2192562).

Almost surely, 2^20873402 is an apocalyptic number.

20873402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20873402 is a deficient number, since it is larger than the sum of its proper divisors (14207590).

20873402 is a wasteful number, since it uses less digits than its factorization.

20873402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25693.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20873402 is about 4568.7418399380. The cubic root of 20873402 is about 275.3368961986.

Subtracting from 20873402 its reverse (20437802), we obtain a square (435600 = 660²).

The spelling of 20873402 in words is "twenty million, eight hundred seventy-three thousand, four hundred two".