20342072820 has 96 divisors (see below), whose sum is σ = 58234982400. Its totient is φ = 5303177344.

The previous prime is 20342072819. The next prime is 20342072837. The reversal of 20342072820 is 2827024302.

It is a super-2 number, since 2×20342072820² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2870041 + ... + 2877119.

It is an arithmetic number, because the mean of its divisors is an integer number (606614400).

Almost surely, 2^20342072820 is an apocalyptic number.

20342072820 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 20342072820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29117491200).

20342072820 is an abundant number, since it is smaller than the sum of its proper divisors (37892909580).

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

20342072820 is a wasteful number, since it uses less digits than its factorization.

20342072820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8157 (or 8155 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The spelling of 20342072820 in words is "twenty billion, three hundred forty-two million, seventy-two thousand, eight hundred twenty".