20265404 has 6 divisors (see below), whose sum is σ = 35464464. Its totient is φ = 10132700.

The previous prime is 20265391. The next prime is 20265407. The reversal of 20265404 is 40456202.

It is a self number, because there is not a number n which added to its sum of digits gives 20265404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20265407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2533172 + ... + 2533179.

It is an arithmetic number, because the mean of its divisors is an integer number (5910744).

Almost surely, 2^20265404 is an apocalyptic number.

It is an amenable number.

20265404 is a deficient number, since it is larger than the sum of its proper divisors (15199060).

20265404 is a wasteful number, since it uses less digits than its factorization.

20265404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066355 (or 5066353 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20265404 is about 4501.7112301879. The cubic root of 20265404 is about 272.6371848041.

The spelling of 20265404 in words is "twenty million, two hundred sixty-five thousand, four hundred four".