20420244020 has 24 divisors (see below), whose sum is σ = 46780923168. Its totient is φ = 7425543200.

The previous prime is 20420244011. The next prime is 20420244043. The reversal of 20420244020 is 2044202402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20420243983 and 20420244001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46409426 + ... + 46409865.

It is an arithmetic number, because the mean of its divisors is an integer number (1949205132).

Almost surely, 2^20420244020 is an apocalyptic number.

20420244020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20420244020 is an abundant number, since it is smaller than the sum of its proper divisors (26360679148).

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

20420244020 is a wasteful number, since it uses less digits than its factorization.

20420244020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92819311 (or 92819309 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20420244020 its reverse (2044202402), we get a palindrome (22464446422).

The spelling of 20420244020 in words is "twenty billion, four hundred twenty million, two hundred forty-four thousand, twenty".