20031450 has 24 divisors (see below), whose sum is σ = 49678368. Its totient is φ = 5341680.

The previous prime is 20031449. The next prime is 20031461. The reversal of 20031450 is 5413002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66622 + ... + 66921.

It is an arithmetic number, because the mean of its divisors is an integer number (2069932).

Almost surely, 2^20031450 is an apocalyptic number.

20031450 is an abundant number, since it is smaller than the sum of its proper divisors (29646918).

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

20031450 is a wasteful number, since it uses less digits than its factorization.

20031450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133558 (or 133553 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20031450 is about 4475.6507906672. The cubic root of 20031450 is about 271.5839678692.

Adding to 20031450 its reverse (5413002), we get a palindrome (25444452).

The spelling of 20031450 in words is "twenty million, thirty-one thousand, four hundred fifty".