403840666230021 has 32 divisors (see below), whose sum is σ = 604470258163200. Its totient is φ = 266444936654400.

The previous prime is 403840666229977. The next prime is 403840666230037. The reversal of 403840666230021 is 120032666048304.

It is not a de Polignac number, because 403840666230021 - 2¹⁵ = 403840666197253 is a prime.

It is a super-2 number, since 2×403840666230021² (a number of 30 digits) 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 (403840666230061) 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, 26139766 + ... + 38613063.

It is an arithmetic number, because the mean of its divisors is an integer number (18889695567600).

Almost surely, 2^{403840666230021} is an apocalyptic number.

It is an amenable number.

403840666230021 is a deficient number, since it is larger than the sum of its proper divisors (200629591933179).

403840666230021 is a wasteful number, since it uses less digits than its factorization.

403840666230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64755226 (or 64755220 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 403840666230021 in words is "four hundred three trillion, eight hundred forty billion, six hundred sixty-six million, two hundred thirty thousand, twenty-one".