9495742021 has 4 divisors (see below), whose sum is σ = 9496168000. Its totient is φ = 9495316044.

The previous prime is 9495742013. The next prime is 9495742099. The reversal of 9495742021 is 1202475949.

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 9495742021 - 2³ = 9495742013 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 (9495742621) 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, 177591 + ... + 224788.

It is an arithmetic number, because the mean of its divisors is an integer number (2374042000).

Almost surely, 2^9495742021 is an apocalyptic number.

It is an amenable number.

9495742021 is a deficient number, since it is larger than the sum of its proper divisors (425979).

9495742021 is a wasteful number, since it uses less digits than its factorization.

9495742021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425978.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 9495742021 is about 97446.0980286025. The cubic root of 9495742021 is about 2117.5953229489.

The spelling of 9495742021 in words is "nine billion, four hundred ninety-five million, seven hundred forty-two thousand, twenty-one".