20631060 has 36 divisors (see below), whose sum is σ = 62581428. Its totient is φ = 5501568.

The previous prime is 20631043. The next prime is 20631097. The reversal of 20631060 is 6013602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7584516 + 13046544 = 2754^2 + 3612^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 57129 + ... + 57488.

It is an arithmetic number, because the mean of its divisors is an integer number (1738373).

Almost surely, 2^20631060 is an apocalyptic number.

20631060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20631060 is an abundant number, since it is smaller than the sum of its proper divisors (41950368).

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

20631060 is a wasteful number, since it uses less digits than its factorization.

20631060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114632 (or 114627 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20631060 is about 4542.1426661874. The cubic root of 20631060 is about 274.2671839230.

Adding to 20631060 its reverse (6013602), we get a palindrome (26644662).

The spelling of 20631060 in words is "twenty million, six hundred thirty-one thousand, sixty".