20749096620 has 384 divisors, whose sum is σ = 75227443200. Its totient is φ = 4650338304.

The previous prime is 20749096609. The next prime is 20749096631. The reversal of 20749096620 is 2669094702.

It is an interprime number because it is at equal distance from previous prime (20749096609) and next prime (20749096631).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 53339386 + ... + 53339774.

It is an arithmetic number, because the mean of its divisors is an integer number (195904800).

Almost surely, 2^20749096620 is an apocalyptic number.

20749096620 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 20749096620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37613721600).

20749096620 is an abundant number, since it is smaller than the sum of its proper divisors (54478346580).

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

20749096620 is a wasteful number, since it uses less digits than its factorization.

20749096620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 20749096620 in words is "twenty billion, seven hundred forty-nine million, ninety-six thousand, six hundred twenty".