20020220577 has 48 divisors (see below), whose sum is σ = 35378982912. Its totient is φ = 11071060560.

The previous prime is 20020220531. The next prime is 20020220677. The reversal of 20020220577 is 77502202002.

It is a happy number.

It is not a de Polignac number, because 20020220577 - 2⁷ = 20020220449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20020220577.

It is not an unprimeable number, because it can be changed into a prime (20020220377) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137103 + ... + 242564.

It is an arithmetic number, because the mean of its divisors is an integer number (737062144).

Almost surely, 2^20020220577 is an apocalyptic number.

20020220577 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20020220577 is a deficient number, since it is larger than the sum of its proper divisors (15358762335).

20020220577 is an equidigital number, since it uses as much as digits as its factorization.

20020220577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379720 (or 379708 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

Adding to 20020220577 its reverse (77502202002), we get a palindrome (97522422579).

The spelling of 20020220577 in words is "twenty billion, twenty million, two hundred twenty thousand, five hundred seventy-seven".