20010235551 has 8 divisors (see below), whose sum is σ = 26682610560. Its totient is φ = 13339008792.

The previous prime is 20010235547. The next prime is 20010235613. The reversal of 20010235551 is 15553201002.

It is a happy number.

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

It is not a de Polignac number, because 20010235551 - 2² = 20010235547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010235541) 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, 245541 + ... + 316718.

It is an arithmetic number, because the mean of its divisors is an integer number (3335326320).

Almost surely, 2^20010235551 is an apocalyptic number.

20010235551 is a deficient number, since it is larger than the sum of its proper divisors (6672375009).

20010235551 is a wasteful number, since it uses less digits than its factorization.

20010235551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574125.

The product of its (nonzero) digits is 1500, while the sum is 24.

Adding to 20010235551 its reverse (15553201002), we get a palindrome (35563436553).

The spelling of 20010235551 in words is "twenty billion, ten million, two hundred thirty-five thousand, five hundred fifty-one".