20249637 has 8 divisors (see below), whose sum is σ = 28173504. Its totient is φ = 12912768.

The previous prime is 20249633. The next prime is 20249641. The reversal of 20249637 is 73694202.

It is an interprime number because it is at equal distance from previous prime (20249633) and next prime (20249641).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20249637 - 2² = 20249633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20249598 and 20249607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20249633) 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 7 ways as a sum of consecutive naturals, for example, 146668 + ... + 146805.

It is an arithmetic number, because the mean of its divisors is an integer number (3521688).

Almost surely, 2^20249637 is an apocalyptic number.

It is an amenable number.

20249637 is a deficient number, since it is larger than the sum of its proper divisors (7923867).

20249637 is a wasteful number, since it uses less digits than its factorization.

20249637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293499.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 20249637 is about 4499.9596664859. The cubic root of 20249637 is about 272.5664602366.

The spelling of 20249637 in words is "twenty million, two hundred forty-nine thousand, six hundred thirty-seven".