20934887 has 8 divisors (see below), whose sum is σ = 21768432. Its totient is φ = 20116800.

The previous prime is 20934883. The next prime is 20934913. The reversal of 20934887 is 78843902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20934887 - 2² = 20934883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20934883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1064 + ... + 6557.

It is an arithmetic number, because the mean of its divisors is an integer number (2721054).

Almost surely, 2^20934887 is an apocalyptic number.

20934887 is a deficient number, since it is larger than the sum of its proper divisors (833545).

20934887 is an equidigital number, since it uses as much as digits as its factorization.

20934887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7729.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 20934887 is about 4575.4657686404. The cubic root of 20934887 is about 275.6069766582.

The spelling of 20934887 in words is "twenty million, nine hundred thirty-four thousand, eight hundred eighty-seven".