20700507 has 8 divisors (see below), whose sum is σ = 27717120. Its totient is φ = 13742120.

The previous prime is 20700503. The next prime is 20700523. The reversal of 20700507 is 70500702.

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

It is a cyclic number.

It is not a de Polignac number, because 20700507 - 2² = 20700503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20700503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13719 + ... + 15152.

It is an arithmetic number, because the mean of its divisors is an integer number (3464640).

Almost surely, 2^20700507 is an apocalyptic number.

20700507 is a deficient number, since it is larger than the sum of its proper divisors (7016613).

20700507 is a wasteful number, since it uses less digits than its factorization.

20700507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29113.

The product of its (nonzero) digits is 490, while the sum is 21.

The square root of 20700507 is about 4549.7809837398. The cubic root of 20700507 is about 274.5745796870.

The spelling of 20700507 in words is "twenty million, seven hundred thousand, five hundred seven".