20701407 has 4 divisors (see below), whose sum is σ = 27601880. Its totient is φ = 13800936.

The previous prime is 20701379. The next prime is 20701423. The reversal of 20701407 is 70410702.

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

It is not a de Polignac number, because 20701407 - 2¹⁵ = 20668639 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 (20701477) 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, 3450232 + ... + 3450237.

It is an arithmetic number, because the mean of its divisors is an integer number (6900470).

Almost surely, 2^20701407 is an apocalyptic number.

20701407 is a deficient number, since it is larger than the sum of its proper divisors (6900473).

20701407 is an equidigital number, since it uses as much as digits as its factorization.

20701407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6900472.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20701407 is about 4549.8798885245. The cubic root of 20701407 is about 274.5785588736.

The spelling of 20701407 in words is "twenty million, seven hundred one thousand, four hundred seven".