20120331 has 48 divisors (see below), whose sum is σ = 35589888. Its totient is φ = 9979200.

The previous prime is 20120323. The next prime is 20120363. The reversal of 20120331 is 13302102.

It is a happy number.

It is not a de Polignac number, because 20120331 - 2³ = 20120323 is a prime.

It is a super-2 number, since 2×20120331² = 809655439099122, which contains 22 as substring.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (20120531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36921 + ... + 37461.

It is an arithmetic number, because the mean of its divisors is an integer number (741456).

Almost surely, 2^20120331 is an apocalyptic number.

20120331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20120331 is a deficient number, since it is larger than the sum of its proper divisors (15469557).

20120331 is a wasteful number, since it uses less digits than its factorization.

20120331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20120331 is about 4485.5691946508. The cubic root of 20120331 is about 271.9850545061.

Adding to 20120331 its reverse (13302102), we get a palindrome (33422433).

The spelling of 20120331 in words is "twenty million, one hundred twenty thousand, three hundred thirty-one".