20087553 has 8 divisors (see below), whose sum is σ = 27237600. Its totient is φ = 13164608.

The previous prime is 20087539. The next prime is 20087563. The reversal of 20087553 is 35578002.

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 20087553 - 2⁴ = 20087537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20087553.

It is not an unprimeable number, because it can be changed into a prime (20087513) 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, 56568 + ... + 56921.

It is an arithmetic number, because the mean of its divisors is an integer number (3404700).

Almost surely, 2^20087553 is an apocalyptic number.

It is an amenable number.

20087553 is a deficient number, since it is larger than the sum of its proper divisors (7150047).

20087553 is a wasteful number, since it uses less digits than its factorization.

20087553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113551.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 20087553 is about 4481.9139884652. The cubic root of 20087553 is about 271.8372774192.

The spelling of 20087553 in words is "twenty million, eighty-seven thousand, five hundred fifty-three".