20054390 has 48 divisors (see below), whose sum is σ = 40134528. Its totient is φ = 7189248.

The previous prime is 20054389. The next prime is 20054393. The reversal of 20054390 is 9345002.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20054393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89819 + ... + 90041.

It is an arithmetic number, because the mean of its divisors is an integer number (836136).

Almost surely, 2^20054390 is an apocalyptic number.

20054390 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20054390 is a wasteful number, since it uses less digits than its factorization.

20054390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20054390 is about 4478.2128131655. The cubic root of 20054390 is about 271.6876008977.

Adding to 20054390 its reverse (9345002), we get a palindrome (29399392).

The spelling of 20054390 in words is "twenty million, fifty-four thousand, three hundred ninety".