20021232255 has 16 divisors (see below), whose sum is σ = 32715546624. Its totient is φ = 10450798880.

The previous prime is 20021232239. The next prime is 20021232263. The reversal of 20021232255 is 55223212002.

It is not a de Polignac number, because 20021232255 - 2⁴ = 20021232239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14198751 + ... + 14200160.

It is an arithmetic number, because the mean of its divisors is an integer number (2044721664).

Almost surely, 2^20021232255 is an apocalyptic number.

20021232255 is a deficient number, since it is larger than the sum of its proper divisors (12694314369).

20021232255 is a wasteful number, since it uses less digits than its factorization.

20021232255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28398966.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20021232255 its reverse (55223212002), we get a palindrome (75244444257).

The spelling of 20021232255 in words is "twenty billion, twenty-one million, two hundred thirty-two thousand, two hundred fifty-five".