20123010240 has 112 divisors (see below), whose sum is σ = 64319810400. Its totient is φ = 5330083840.

The previous prime is 20123010239. The next prime is 20123010241. The reversal of 20123010240 is 4201032102.

It is an interprime number because it is at equal distance from previous prime (20123010239) and next prime (20123010241).

It is a super-2 number, since 2×20123010240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20123010241) 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, 72700 + ... + 213380.

Almost surely, 2^20123010240 is an apocalyptic number.

20123010240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20123010240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32159905200).

20123010240 is an abundant number, since it is smaller than the sum of its proper divisors (44196800160).

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

20123010240 is a wasteful number, since it uses less digits than its factorization.

20123010240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140850 (or 140840 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20123010240 its reverse (4201032102), we get a palindrome (24324042342).

The spelling of 20123010240 in words is "twenty billion, one hundred twenty-three million, ten thousand, two hundred forty".