20587497 has 24 divisors (see below), whose sum is σ = 32684256. Its totient is φ = 11487168.

The previous prime is 20587487. The next prime is 20587513. The reversal of 20587497 is 79478502.

It is not a de Polignac number, because 20587497 - 2⁶ = 20587433 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20587417) 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 23 ways as a sum of consecutive naturals, for example, 4693 + ... + 7949.

It is an arithmetic number, because the mean of its divisors is an integer number (1361844).

Almost surely, 2^20587497 is an apocalyptic number.

It is an amenable number.

20587497 is a deficient number, since it is larger than the sum of its proper divisors (12096759).

20587497 is a wasteful number, since it uses less digits than its factorization.

20587497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317 (or 3310 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 20587497 is about 4537.3447080864. The cubic root of 20587497 is about 274.0740072169.

The spelling of 20587497 in words is "twenty million, five hundred eighty-seven thousand, four hundred ninety-seven".