20431094 has 8 divisors (see below), whose sum is σ = 31066680. Its totient is φ = 10075536.

The previous prime is 20431091. The next prime is 20431097. The reversal of 20431094 is 49013402.

It is an interprime number because it is at equal distance from previous prime (20431091) and next prime (20431097).

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

It is a super-3 number, since 3×20431094³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431091) 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, 69824 + ... + 70115.

It is an arithmetic number, because the mean of its divisors is an integer number (3883335).

Almost surely, 2^20431094 is an apocalyptic number.

20431094 is a deficient number, since it is larger than the sum of its proper divisors (10635586).

20431094 is a wasteful number, since it uses less digits than its factorization.

20431094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140014.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20431094 is about 4520.0767692596. The cubic root of 20431094 is about 273.3781964169.

Adding to 20431094 its reverse (49013402), we get a palindrome (69444496).

The spelling of 20431094 in words is "twenty million, four hundred thirty-one thousand, ninety-four".