20311016 has 16 divisors (see below), whose sum is σ = 41545440. Its totient is φ = 9232240.

The previous prime is 20310973. The next prime is 20311043. The reversal of 20311016 is 61011302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115316 + ... + 115491.

It is an arithmetic number, because the mean of its divisors is an integer number (2596590).

Almost surely, 2^20311016 is an apocalyptic number.

It is an amenable number.

20311016 is an abundant number, since it is smaller than the sum of its proper divisors (21234424).

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

20311016 is a wasteful number, since it uses less digits than its factorization.

20311016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230824 (or 230820 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 20311016 is about 4506.7744563046. The cubic root of 20311016 is about 272.8415759797.

Adding to 20311016 its reverse (61011302), we get a palindrome (81322318).

It can be divided in two parts, 2031 and 1016, that multiplied together give a triangular number (2063496 = T₂₀₃₁).

The spelling of 20311016 in words is "twenty million, three hundred eleven thousand, sixteen".