20867080 has 32 divisors (see below), whose sum is σ = 50563800. Its totient is φ = 7704576.

The previous prime is 20867057. The next prime is 20867101. The reversal of 20867080 is 8076802.

It can be written as a sum of positive squares in 4 ways, for example, as 5982916 + 14884164 = 2446^2 + 3858^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19545 + ... + 20584.

Almost surely, 2^20867080 is an apocalyptic number.

20867080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20867080 is an abundant number, since it is smaller than the sum of its proper divisors (29696720).

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

20867080 is a wasteful number, since it uses less digits than its factorization.

20867080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40153 (or 40149 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 20867080 is about 4568.0499121616. The cubic root of 20867080 is about 275.3090959767.

The spelling of 20867080 in words is "twenty million, eight hundred sixty-seven thousand, eighty".