20502331000 has 64 divisors (see below), whose sum is σ = 48006185760. Its totient is φ = 8195680000.

The previous prime is 20502330907. The next prime is 20502331009. The reversal of 20502331000 is 13320502.

It is a super-2 number, since 2×20502331000² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502331009) 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, 1805340 + ... + 1816660.

Almost surely, 2^20502331000 is an apocalyptic number.

20502331000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20502331000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24003092880).

20502331000 is an abundant number, since it is smaller than the sum of its proper divisors (27503854760).

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

20502331000 is a wasteful number, since it uses less digits than its factorization.

20502331000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13153 (or 13139 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

Adding to 20502331000 its reverse (13320502), we get a palindrome (20515651502).

The spelling of 20502331000 in words is "twenty billion, five hundred two million, three hundred thirty-one thousand".