4247970021 has 16 divisors (see below), whose sum is σ = 6496299520. Its totient is φ = 2740625280.

The previous prime is 4247969983. The next prime is 4247970029. The reversal of 4247970021 is 1200797424.

It is not a de Polignac number, because 4247970021 - 2⁷ = 4247969893 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 (4247970029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2536780 + ... + 2538453.

It is an arithmetic number, because the mean of its divisors is an integer number (406018720).

Almost surely, 2^4247970021 is an apocalyptic number.

It is an amenable number.

4247970021 is a deficient number, since it is larger than the sum of its proper divisors (2248329499).

4247970021 is a wasteful number, since it uses less digits than its factorization.

4247970021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5075273 (or 5075267 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 4247970021 is about 65176.4529642416. The cubic root of 4247970021 is about 1619.5479637270.

The spelling of 4247970021 in words is "four billion, two hundred forty-seven million, nine hundred seventy thousand, twenty-one".