2420729771 has 4 divisors (see below), whose sum is σ = 2451372000. Its totient is φ = 2390087544.

The previous prime is 2420729761. The next prime is 2420729803. The reversal of 2420729771 is 1779270242.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2420729771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2420729761) 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, 15320996 + ... + 15321153.

It is an arithmetic number, because the mean of its divisors is an integer number (612843000).

Almost surely, 2^2420729771 is an apocalyptic number.

2420729771 is a deficient number, since it is larger than the sum of its proper divisors (30642229).

2420729771 is an equidigital number, since it uses as much as digits as its factorization.

2420729771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30642228.

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 2420729771 is about 49200.9122984524. The cubic root of 2420729771 is about 1342.7096301850.

The spelling of 2420729771 in words is "two billion, four hundred twenty million, seven hundred twenty-nine thousand, seven hundred seventy-one".