20302137 has 16 divisors (see below), whose sum is σ = 30194880. Its totient is φ = 13481856.

The previous prime is 20302133. The next prime is 20302147. The reversal of 20302137 is 73120302.

It is not a de Polignac number, because 20302137 - 2² = 20302133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20302133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6313 + ... + 8969.

It is an arithmetic number, because the mean of its divisors is an integer number (1887180).

Almost surely, 2^20302137 is an apocalyptic number.

20302137 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20302137 is a deficient number, since it is larger than the sum of its proper divisors (9892743).

20302137 is a wasteful number, since it uses less digits than its factorization.

20302137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949 (or 2943 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20302137 is about 4505.7892760314. The cubic root of 20302137 is about 272.8018124437.

Adding to 20302137 its reverse (73120302), we get a palindrome (93422439).

The spelling of 20302137 in words is "twenty million, three hundred two thousand, one hundred thirty-seven".