38434432621 has 16 divisors (see below), whose sum is σ = 42046018560. Its totient is φ = 34918473600.

The previous prime is 38434432607. The next prime is 38434432633. The reversal of 38434432621 is 12623443483.

It is a cyclic number.

It is not a de Polignac number, because 38434432621 - 2⁹ = 38434432109 is a prime.

It is a super-2 number, since 2×38434432621² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38434432651) 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, 412296 + ... + 496846.

It is an arithmetic number, because the mean of its divisors is an integer number (2627876160).

Almost surely, 2^38434432621 is an apocalyptic number.

It is an amenable number.

38434432621 is a deficient number, since it is larger than the sum of its proper divisors (3611585939).

38434432621 is a wasteful number, since it uses less digits than its factorization.

38434432621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85116.

The product of its digits is 331776, while the sum is 40.

The spelling of 38434432621 in words is "thirty-eight billion, four hundred thirty-four million, four hundred thirty-two thousand, six hundred twenty-one".