20719401 has 4 divisors (see below), whose sum is σ = 27625872. Its totient is φ = 13812932.

The previous prime is 20719399. The next prime is 20719411. The reversal of 20719401 is 10491702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20719401 - 2¹ = 20719399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20719411) 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, 3453231 + ... + 3453236.

It is an arithmetic number, because the mean of its divisors is an integer number (6906468).

Almost surely, 2^20719401 is an apocalyptic number.

It is an amenable number.

20719401 is a deficient number, since it is larger than the sum of its proper divisors (6906471).

20719401 is an equidigital number, since it uses as much as digits as its factorization.

20719401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6906470.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 20719401 is about 4551.8568738483. The cubic root of 20719401 is about 274.6580918855.

The spelling of 20719401 in words is "twenty million, seven hundred nineteen thousand, four hundred one".