7138458021 has 8 divisors (see below), whose sum is σ = 9587418624. Its totient is φ = 4724234720.

The previous prime is 7138458017. The next prime is 7138458031. The reversal of 7138458021 is 1208548317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7138458021 - 2² = 7138458017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138458031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8683845 + ... + 8684666.

It is an arithmetic number, because the mean of its divisors is an integer number (1198427328).

Almost surely, 2^7138458021 is an apocalyptic number.

It is an amenable number.

7138458021 is a deficient number, since it is larger than the sum of its proper divisors (2448960603).

7138458021 is a wasteful number, since it uses less digits than its factorization.

7138458021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17368651.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 7138458021 is about 84489.3959085991. The cubic root of 7138458021 is about 1925.4613406896.

The spelling of 7138458021 in words is "seven billion, one hundred thirty-eight million, four hundred fifty-eight thousand, twenty-one".