20554495 has 8 divisors (see below), whose sum is σ = 26562816. Its totient is φ = 15178656.

The previous prime is 20554493. The next prime is 20554517. The reversal of 20554495 is 59445502.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20554495 - 2¹ = 20554493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20554495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554493) 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, 158047 + ... + 158176.

It is an arithmetic number, because the mean of its divisors is an integer number (3320352).

Almost surely, 2^20554495 is an apocalyptic number.

20554495 is a deficient number, since it is larger than the sum of its proper divisors (6008321).

20554495 is a wasteful number, since it uses less digits than its factorization.

20554495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316241.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 20554495 is about 4533.7065410103. The cubic root of 20554495 is about 273.9274809414.

Adding to 20554495 its reverse (59445502), we get a palindrome (79999997).

The spelling of 20554495 in words is "twenty million, five hundred fifty-four thousand, four hundred ninety-five".