20010217580 has 24 divisors (see below), whose sum is σ = 43848477792. Its totient is φ = 7656083072.

The previous prime is 20010217541. The next prime is 20010217609. The reversal of 20010217580 is 8571201002.

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, 21749777 + ... + 21750696.

It is an arithmetic number, because the mean of its divisors is an integer number (1827019908).

Almost surely, 2^20010217580 is an apocalyptic number.

20010217580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010217580 is an abundant number, since it is smaller than the sum of its proper divisors (23838260212).

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

20010217580 is a wasteful number, since it uses less digits than its factorization.

20010217580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43500505 (or 43500503 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 20010217580 its reverse (8571201002), we get a palindrome (28581418582).

The spelling of 20010217580 in words is "twenty billion, ten million, two hundred seventeen thousand, five hundred eighty".