20701501 has 4 divisors (see below), whose sum is σ = 20727900. Its totient is φ = 20675104.

The previous prime is 20701493. The next prime is 20701511. The reversal of 20701501 is 10510702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18481401 + 2220100 = 4299^2 + 1490^2 .

It is a cyclic number.

It is not a de Polignac number, because 20701501 - 2³ = 20701493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20701511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11986 + ... + 13603.

It is an arithmetic number, because the mean of its divisors is an integer number (5181975).

Almost surely, 2^20701501 is an apocalyptic number.

It is an amenable number.

20701501 is a deficient number, since it is larger than the sum of its proper divisors (26399).

20701501 is an equidigital number, since it uses as much as digits as its factorization.

20701501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26398.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 20701501 is about 4549.8902184558. The cubic root of 20701501 is about 274.5789744708.

The spelling of 20701501 in words is "twenty million, seven hundred one thousand, five hundred one".