20312418672 has 360 divisors, whose sum is σ = 72339557472. Its totient is φ = 5181096960.

The previous prime is 20312418671. The next prime is 20312418683. The reversal of 20312418672 is 27681421302.

It is a happy number.

It is a super-2 number, since 2×20312418672² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312418671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12592138 + ... + 12593750.

Almost surely, 2^20312418672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312418672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36169778736).

20312418672 is an abundant number, since it is smaller than the sum of its proper divisors (52027138800).

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

20312418672 is a wasteful number, since it uses less digits than its factorization.

20312418672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709 (or 1669 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

Adding to 20312418672 its reverse (27681421302), we get a palindrome (47993839974).

The spelling of 20312418672 in words is "twenty billion, three hundred twelve million, four hundred eighteen thousand, six hundred seventy-two".