20023331240 has 32 divisors (see below), whose sum is σ = 49148177760. Its totient is φ = 7281211200.

The previous prime is 20023331239. The next prime is 20023331243. The reversal of 20023331240 is 4213332002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (20023331243) 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, 22753346 + ... + 22754225.

It is an arithmetic number, because the mean of its divisors is an integer number (1535880555).

Almost surely, 2^20023331240 is an apocalyptic number.

20023331240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20023331240 is an abundant number, since it is smaller than the sum of its proper divisors (29124846520).

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

20023331240 is a wasteful number, since it uses less digits than its factorization.

20023331240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45507593 (or 45507589 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20023331240 its reverse (4213332002), we get a palindrome (24236663242).

The spelling of 20023331240 in words is "twenty billion, twenty-three million, three hundred thirty-one thousand, two hundred forty".