43370020235421 has 18 divisors (see below), whose sum is σ = 68858370054110. Its totient is φ = 26284860748080.

The previous prime is 43370020235407. The next prime is 43370020235497. The reversal of 43370020235421 is 12453202007334.

43370020235421 is a `hidden beast` number, since 4 + 3 + 3 + 70 + 0 + 20 + 23 + 542 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26267982552900 + 17102037682521 = 5125230^2 + 4135461^2 .

It is not a de Polignac number, because 43370020235421 - 2¹¹ = 43370020233373 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 (43370020235401) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19912772206 + ... + 19912774383.

Almost surely, 2^{43370020235421} is an apocalyptic number.

It is an amenable number.

43370020235421 is a deficient number, since it is larger than the sum of its proper divisors (25488349818689).

43370020235421 is a wasteful number, since it uses less digits than its factorization.

43370020235421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39825546617 (or 39825546603 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 36.

The spelling of 43370020235421 in words is "forty-three trillion, three hundred seventy billion, twenty million, two hundred thirty-five thousand, four hundred twenty-one".