20875642 has 16 divisors (see below), whose sum is σ = 33768000. Its totient is φ = 9646560.

The previous prime is 20875637. The next prime is 20875667. The reversal of 20875642 is 24657802.

It is a junction number, because it is equal to n+sod(n) for n = 20875598 and 20875607.

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, 5142 + ... + 8257.

It is an arithmetic number, because the mean of its divisors is an integer number (2110500).

Almost surely, 2^20875642 is an apocalyptic number.

20875642 is a deficient number, since it is larger than the sum of its proper divisors (12892358).

20875642 is a wasteful number, since it uses less digits than its factorization.

20875642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13461.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 20875642 is about 4568.9869774382. The cubic root of 20875642 is about 275.3467449778.

The spelling of 20875642 in words is "twenty million, eight hundred seventy-five thousand, six hundred forty-two".