20550333500 has 48 divisors (see below), whose sum is σ = 47244156960. Its totient is φ = 7787491200.

The previous prime is 20550333491. The next prime is 20550333509. The reversal of 20550333500 is 533305502.

It is an interprime number because it is at equal distance from previous prime (20550333491) and next prime (20550333509).

It is a super-2 number, since 2×20550333500² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20550333500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550333509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1072097 + ... + 1091096.

It is an arithmetic number, because the mean of its divisors is an integer number (984253270).

Almost surely, 2^20550333500 is an apocalyptic number.

20550333500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20550333500 is an abundant number, since it is smaller than the sum of its proper divisors (26693823460).

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

20550333500 is a wasteful number, since it uses less digits than its factorization.

20550333500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163231 (or 2163219 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 26.

The spelling of 20550333500 in words is "twenty billion, five hundred fifty million, three hundred thirty-three thousand, five hundred".