31020203000 has 64 divisors (see below), whose sum is σ = 72835701120. Its totient is φ = 12365616000.

The previous prime is 31020202999. The next prime is 31020203021. The reversal of 31020203000 is 30202013.

It is a super-2 number, since 2×31020203000² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240065 + ... + 345935.

It is an arithmetic number, because the mean of its divisors is an integer number (1138057830).

Almost surely, 2^31020203000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31020203000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36417850560).

31020203000 is an abundant number, since it is smaller than the sum of its proper divisors (41815498120).

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

31020203000 is a wasteful number, since it uses less digits than its factorization.

31020203000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106185 (or 106171 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

Adding to 31020203000 its reverse (30202013), we get a palindrome (31050405013).

The spelling of 31020203000 in words is "thirty-one billion, twenty million, two hundred three thousand".