20243788 has 12 divisors (see below), whose sum is σ = 35465472. Its totient is φ = 10110800.

The previous prime is 20243779. The next prime is 20243809. The reversal of 20243788 is 88734202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2406 + ... + 6802.

It is an arithmetic number, because the mean of its divisors is an integer number (2955456).

Almost surely, 2^20243788 is an apocalyptic number.

It is an amenable number.

20243788 is a deficient number, since it is larger than the sum of its proper divisors (15221684).

20243788 is a wasteful number, since it uses less digits than its factorization.

20243788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552 (or 5550 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 20243788 is about 4499.3097248356. The cubic root of 20243788 is about 272.5402145851.

The spelling of 20243788 in words is "twenty million, two hundred forty-three thousand, seven hundred eighty-eight".