20011456 has 14 divisors (see below), whose sum is σ = 39710360. Its totient is φ = 10005696.

The previous prime is 20011441. The next prime is 20011463. The reversal of 20011456 is 65411002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156276 + ... + 156403.

Almost surely, 2^20011456 is an apocalyptic number.

It is an amenable number.

20011456 is a deficient number, since it is larger than the sum of its proper divisors (19698904).

20011456 is an equidigital number, since it uses as much as digits as its factorization.

20011456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312691 (or 312681 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20011456 is about 4473.4165913762. The cubic root of 20011456 is about 271.4935790474.

Adding to 20011456 its reverse (65411002), we get a palindrome (85422458).

The spelling of 20011456 in words is "twenty million, eleven thousand, four hundred fifty-six".