20888943 has 16 divisors (see below), whose sum is σ = 28753920. Its totient is φ = 13482144.

The previous prime is 20888941. The next prime is 20888953. The reversal of 20888943 is 34988802.

It is a happy number.

It is not a de Polignac number, because 20888943 - 2¹ = 20888941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20888895 and 20888904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20888941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11730 + ... + 13392.

It is an arithmetic number, because the mean of its divisors is an integer number (1797120).

Almost surely, 2^20888943 is an apocalyptic number.

20888943 is a deficient number, since it is larger than the sum of its proper divisors (7864977).

20888943 is a wasteful number, since it uses less digits than its factorization.

20888943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 20888943 is about 4570.4423199511. The cubic root of 20888943 is about 275.4052119940.

The spelling of 20888943 in words is "twenty million, eight hundred eighty-eight thousand, nine hundred forty-three".