4067694021 has 32 divisors (see below), whose sum is σ = 5778432000. Its totient is φ = 2538043200.

The previous prime is 4067693999. The next prime is 4067694061. The reversal of 4067694021 is 1204967604.

It is a happy number.

4067694021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4067694021 - 2²³ = 4059305413 is a prime.

It is a super-2 number, since 2×4067694021² = 33092269296958296882, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4067694061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1694380 + ... + 1696778.

It is an arithmetic number, because the mean of its divisors is an integer number (180576000).

Almost surely, 2^4067694021 is an apocalyptic number.

It is an amenable number.

4067694021 is a deficient number, since it is larger than the sum of its proper divisors (1710737979).

4067694021 is a wasteful number, since it uses less digits than its factorization.

4067694021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 4067694021 is about 63778.4761577133. The cubic root of 4067694021 is about 1596.3058027823.

The spelling of 4067694021 in words is "four billion, sixty-seven million, six hundred ninety-four thousand, twenty-one".