20152230840 has 512 divisors, whose sum is σ = 79066368000. Its totient is φ = 4470681600.

The previous prime is 20152230823. The next prime is 20152230859. The reversal of 20152230840 is 4803225102.

It is a super-2 number, since 2×20152230840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 41042995 + ... + 41043485.

It is an arithmetic number, because the mean of its divisors is an integer number (154426500).

Almost surely, 2^20152230840 is an apocalyptic number.

20152230840 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 20152230840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39533184000).

20152230840 is an abundant number, since it is smaller than the sum of its proper divisors (58914137160).

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

20152230840 is a wasteful number, since it uses less digits than its factorization.

20152230840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 20152230840 its reverse (4803225102), we get a palindrome (24955455942).

The spelling of 20152230840 in words is "twenty billion, one hundred fifty-two million, two hundred thirty thousand, eight hundred forty".