20020220720 has 40 divisors (see below), whose sum is σ = 46832608176. Its totient is φ = 7958953728.

The previous prime is 20020220719. The next prime is 20020220729. The reversal of 20020220720 is 2702202002.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (20020220729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 754607 + ... + 780686.

Almost surely, 2^20020220720 is an apocalyptic number.

20020220720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020220720 is an abundant number, since it is smaller than the sum of its proper divisors (26812387456).

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

20020220720 is a wasteful number, since it uses less digits than its factorization.

20020220720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535469 (or 1535463 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

Adding to 20020220720 its reverse (2702202002), we get a palindrome (22722422722).

The spelling of 20020220720 in words is "twenty billion, twenty million, two hundred twenty thousand, seven hundred twenty".