338540202442421 has 16 divisors (see below), whose sum is σ = 416748347793408. Its totient is φ = 268607333530800.

The previous prime is 338540202442369. The next prime is 338540202442447. The reversal of 338540202442421 is 124244202045833.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 338540202442421 - 2¹⁸ = 338540202180277 is a prime.

It is a super-2 number, since 2×338540202442421² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338540202442121) 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, 33915062375 + ... + 33915072356.

It is an arithmetic number, because the mean of its divisors is an integer number (26046771737088).

Almost surely, 2^{338540202442421} is an apocalyptic number.

338540202442421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

338540202442421 is a deficient number, since it is larger than the sum of its proper divisors (78208145350987).

338540202442421 is a wasteful number, since it uses less digits than its factorization.

338540202442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67830134792.

The product of its (nonzero) digits is 1474560, while the sum is 44.

The spelling of 338540202442421 in words is "three hundred thirty-eight trillion, five hundred forty billion, two hundred two million, four hundred forty-two thousand, four hundred twenty-one".