20201123020 has 48 divisors (see below), whose sum is σ = 45696208320. Its totient is φ = 7457147136.

The previous prime is 20201123017. The next prime is 20201123023. The reversal of 20201123020 is 2032110202.

It is an interprime number because it is at equal distance from previous prime (20201123017) and next prime (20201123023).

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (20201123023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1855914 + ... + 1866766.

It is an arithmetic number, because the mean of its divisors is an integer number (952004340).

Almost surely, 2^20201123020 is an apocalyptic number.

20201123020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201123020 is an abundant number, since it is smaller than the sum of its proper divisors (25495085300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20201123020 is a wasteful number, since it uses less digits than its factorization.

20201123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18034 (or 18032 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20201123020 its reverse (2032110202), we get a palindrome (22233233222).

The spelling of 20201123020 in words is "twenty billion, two hundred one million, one hundred twenty-three thousand, twenty".