20793822816 has 144 divisors (see below), whose sum is σ = 62444816784. Its totient is φ = 6021636096.

The previous prime is 20793822809. The next prime is 20793822823. The reversal of 20793822816 is 61822839702.

It is an interprime number because it is at equal distance from previous prime (20793822809) and next prime (20793822823).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331846 + ... + 389498.

It is an arithmetic number, because the mean of its divisors is an integer number (433644561).

Almost surely, 2^20793822816 is an apocalyptic number.

20793822816 is a gapful number since it is divisible by the number (26) 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 20793822816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31222408392).

20793822816 is an abundant number, since it is smaller than the sum of its proper divisors (41650993968).

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

20793822816 is a wasteful number, since it uses less digits than its factorization.

20793822816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57713 (or 57688 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 20793822816 in words is "twenty billion, seven hundred ninety-three million, eight hundred twenty-two thousand, eight hundred sixteen".