20631046 has 16 divisors (see below), whose sum is σ = 32443488. Its totient is φ = 9820800.

The previous prime is 20631043. The next prime is 20631097. The reversal of 20631046 is 64013602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20631043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10156 + ... + 12016.

It is an arithmetic number, because the mean of its divisors is an integer number (2027718).

Almost surely, 2^20631046 is an apocalyptic number.

20631046 is a deficient number, since it is larger than the sum of its proper divisors (11812442).

20631046 is a wasteful number, since it uses less digits than its factorization.

20631046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20631046 is about 4542.1411250643. The cubic root of 20631046 is about 274.2671218848.

Adding to 20631046 its reverse (64013602), we get a palindrome (84644648).

The spelling of 20631046 in words is "twenty million, six hundred thirty-one thousand, forty-six".