20494742701 has 4 divisors (see below), whose sum is σ = 20518602400. Its totient is φ = 20470883004.

The previous prime is 20494742699. The next prime is 20494742753. The reversal of 20494742701 is 10724749402.

It is a happy number.

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 20494742701 - 2¹ = 20494742699 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 (20494742501) 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, 11928561 + ... + 11930278.

It is an arithmetic number, because the mean of its divisors is an integer number (5129650600).

Almost surely, 2^20494742701 is an apocalyptic number.

It is an amenable number.

20494742701 is a deficient number, since it is larger than the sum of its proper divisors (23859699).

20494742701 is an equidigital number, since it uses as much as digits as its factorization.

20494742701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23859698.

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 20494742701 in words is "twenty billion, four hundred ninety-four million, seven hundred forty-two thousand, seven hundred one".