20431002 has 8 divisors (see below), whose sum is σ = 40862016. Its totient is φ = 6810332.

The previous prime is 20430989. The next prime is 20431003. The reversal of 20431002 is 20013402.

It is a sphenic number, since it is the product of 3 distinct primes.

20431002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20431003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702578 + ... + 1702589.

It is an arithmetic number, because the mean of its divisors is an integer number (5107752).

Almost surely, 2^20431002 is an apocalyptic number.

20431002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20431002 is a wasteful number, since it uses less digits than its factorization.

20431002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405172.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20431002 is about 4520.0665924298. The cubic root of 20431002 is about 273.3777860810.

Adding to 20431002 its reverse (20013402), we get a palindrome (40444404).

The spelling of 20431002 in words is "twenty million, four hundred thirty-one thousand, two".