7474736021 has 4 divisors (see below), whose sum is σ = 7868143200. Its totient is φ = 7081328844.

The previous prime is 7474735999. The next prime is 7474736023. The reversal of 7474736021 is 1206374747.

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 a de Polignac number, because none of the positive numbers 2^k-7474736021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7474736021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7474736023) 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, 196703561 + ... + 196703598.

It is an arithmetic number, because the mean of its divisors is an integer number (1967035800).

Almost surely, 2^7474736021 is an apocalyptic number.

It is an amenable number.

7474736021 is a deficient number, since it is larger than the sum of its proper divisors (393407179).

7474736021 is a wasteful number, since it uses less digits than its factorization.

7474736021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393407178.

The product of its (nonzero) digits is 197568, while the sum is 41.

The square root of 7474736021 is about 86456.5556855002. Note that the first 3 decimals coincide. The cubic root of 7474736021 is about 1955.2334562031.

The spelling of 7474736021 in words is "seven billion, four hundred seventy-four million, seven hundred thirty-six thousand, twenty-one".