20294388 has 36 divisors (see below), whose sum is σ = 53202240. Its totient is φ = 6764472.

The previous prime is 20294387. The next prime is 20294401. The reversal of 20294388 is 88349202.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20294381) 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, 9468 + ... + 11411.

It is an arithmetic number, because the mean of its divisors is an integer number (1477840).

Almost surely, 2^20294388 is an apocalyptic number.

It is an amenable number.

20294388 is an abundant number, since it is smaller than the sum of its proper divisors (32907852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20294388 is a wasteful number, since it uses less digits than its factorization.

20294388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20898 (or 20884 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 20294388 is about 4504.9293002221. The cubic root of 20294388 is about 272.7671000018.

The spelling of 20294388 in words is "twenty million, two hundred ninety-four thousand, three hundred eighty-eight".