20154641 has 8 divisors (see below), whose sum is σ = 21967680. Its totient is φ = 18379152.

The previous prime is 20154613. The next prime is 20154653. The reversal of 20154641 is 14645102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20154641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20154671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8261 + ... + 10418.

It is an arithmetic number, because the mean of its divisors is an integer number (2745960).

Almost surely, 2^20154641 is an apocalyptic number.

It is an amenable number.

20154641 is a deficient number, since it is larger than the sum of its proper divisors (1813039).

20154641 is a wasteful number, since it uses less digits than its factorization.

20154641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18775.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20154641 is about 4489.3920523830. The cubic root of 20154641 is about 272.1395666745.

Adding to 20154641 its reverse (14645102), we get a palindrome (34799743).

The spelling of 20154641 in words is "twenty million, one hundred fifty-four thousand, six hundred forty-one".