20506701 has 8 divisors (see below), whose sum is σ = 27368640. Its totient is φ = 13657952.

The previous prime is 20506693. The next prime is 20506723. The reversal of 20506701 is 10760502.

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 20506701 - 2³ = 20506693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20506771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216 + ... + 6518.

It is an arithmetic number, because the mean of its divisors is an integer number (3421080).

Almost surely, 2^20506701 is an apocalyptic number.

It is an amenable number.

20506701 is a deficient number, since it is larger than the sum of its proper divisors (6861939).

20506701 is a wasteful number, since it uses less digits than its factorization.

20506701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6595.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20506701 is about 4528.4325102622. The cubic root of 20506701 is about 273.7150010509.

The spelling of 20506701 in words is "twenty million, five hundred six thousand, seven hundred one".