20147554 has 8 divisors (see below), whose sum is σ = 34538688. Its totient is φ = 8634660.

The previous prime is 20147549. The next prime is 20147587. The reversal of 20147554 is 45574102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719542 + ... + 719569.

It is an arithmetic number, because the mean of its divisors is an integer number (4317336).

Almost surely, 2^20147554 is an apocalyptic number.

20147554 is a deficient number, since it is larger than the sum of its proper divisors (14391134).

20147554 is a wasteful number, since it uses less digits than its factorization.

20147554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439120.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 20147554 is about 4488.6026778943. The cubic root of 20147554 is about 272.1076653503.

The spelling of 20147554 in words is "twenty million, one hundred forty-seven thousand, five hundred fifty-four".