20425388 has 6 divisors (see below), whose sum is σ = 35744436. Its totient is φ = 10212692.

The previous prime is 20425343. The next prime is 20425397. The reversal of 20425388 is 88352402.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2553170 + ... + 2553177.

It is an arithmetic number, because the mean of its divisors is an integer number (5957406).

Almost surely, 2^20425388 is an apocalyptic number.

It is an amenable number.

20425388 is a deficient number, since it is larger than the sum of its proper divisors (15319048).

20425388 is a wasteful number, since it uses less digits than its factorization.

20425388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5106351 (or 5106349 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 20425388 is about 4519.4455412141. The cubic root of 20425388 is about 273.3527443416.

The spelling of 20425388 in words is "twenty million, four hundred twenty-five thousand, three hundred eighty-eight".