33413403421 has 2 divisors, whose sum is σ = 33413403422. Its totient is φ = 33413403420.

The previous prime is 33413403391. The next prime is 33413403437. The reversal of 33413403421 is 12430431433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21865536900 + 11547866521 = 147870^2 + 107461^2 .

It is a cyclic number.

It is not a de Polignac number, because 33413403421 - 2¹⁷ = 33413272349 is a prime.

It is a super-2 number, since 2×33413403421² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33413403421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33413403461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16706701710 + 16706701711.

It is an arithmetic number, because the mean of its divisors is an integer number (16706701711).

Almost surely, 2^33413403421 is an apocalyptic number.

It is an amenable number.

33413403421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33413403421 is an equidigital number, since it uses as much as digits as its factorization.

33413403421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 33413403421 its reverse (12430431433), we get a palindrome (45843834854).

The spelling of 33413403421 in words is "thirty-three billion, four hundred thirteen million, four hundred three thousand, four hundred twenty-one".