20401893 has 12 divisors (see below), whose sum is σ = 29521440. Its totient is φ = 13577256.

The previous prime is 20401867. The next prime is 20401919. The reversal of 20401893 is 39810402.

It is an interprime number because it is at equal distance from previous prime (20401867) and next prime (20401919).

It is not a de Polignac number, because 20401893 - 2⁵ = 20401861 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4488 + ... + 7806.

It is an arithmetic number, because the mean of its divisors is an integer number (2460120).

Almost surely, 2^20401893 is an apocalyptic number.

It is an amenable number.

20401893 is a deficient number, since it is larger than the sum of its proper divisors (9119547).

20401893 is a wasteful number, since it uses less digits than its factorization.

20401893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008 (or 4005 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20401893 is about 4516.8454700156. The cubic root of 20401893 is about 273.2478930190.

The spelling of 20401893 in words is "twenty million, four hundred one thousand, eight hundred ninety-three".