20575051620 has 48 divisors (see below), whose sum is σ = 57991694208. Its totient is φ = 5450342400.

The previous prime is 20575051619. The next prime is 20575051621. The reversal of 20575051620 is 2615057502.

It is an interprime number because it is at equal distance from previous prime (20575051619) and next prime (20575051621).

It is not an unprimeable number, because it can be changed into a prime (20575051621) 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 15 ways as a sum of consecutive naturals, for example, 1126429 + ... + 1144548.

It is an arithmetic number, because the mean of its divisors is an integer number (1208160296).

Almost surely, 2^20575051620 is an apocalyptic number.

20575051620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20575051620 is an abundant number, since it is smaller than the sum of its proper divisors (37416642588).

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

20575051620 is a wasteful number, since it uses less digits than its factorization.

20575051620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271140 (or 2271138 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 33.

The spelling of 20575051620 in words is "twenty billion, five hundred seventy-five million, fifty-one thousand, six hundred twenty".