20185020020 has 24 divisors (see below), whose sum is σ = 46242046368. Its totient is φ = 7340007200.

The previous prime is 20185020019. The next prime is 20185020043. The reversal of 20185020020 is 2002058102.

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 = 20185019974 and 20185020001.

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, 45874826 + ... + 45875265.

It is an arithmetic number, because the mean of its divisors is an integer number (1926751932).

Almost surely, 2^20185020020 is an apocalyptic number.

20185020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20185020020 is an abundant number, since it is smaller than the sum of its proper divisors (26057026348).

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

20185020020 is a wasteful number, since it uses less digits than its factorization.

20185020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91750111 (or 91750109 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 20185020020 its reverse (2002058102), we get a palindrome (22187078122).

The spelling of 20185020020 in words is "twenty billion, one hundred eighty-five million, twenty thousand, twenty".