20147776 has 28 divisors (see below), whose sum is σ = 43616880. Its totient is φ = 9157760.

The previous prime is 20147761. The next prime is 20147789. The reversal of 20147776 is 67774102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13606 + ... + 15013.

Almost surely, 2^20147776 is an apocalyptic number.

It is an amenable number.

20147776 is an abundant number, since it is smaller than the sum of its proper divisors (23469104).

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

20147776 is a wasteful number, since it uses less digits than its factorization.

20147776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28642 (or 28632 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 20147776 is about 4488.6274071257. The cubic root of 20147776 is about 272.1086647715.

The spelling of 20147776 in words is "twenty million, one hundred forty-seven thousand, seven hundred seventy-six".