400333430000021 has 24 divisors (see below), whose sum is σ = 470244567695616. Its totient is φ = 333853943388480.

The previous prime is 400333429999939. The next prime is 400333430000083. The reversal of 400333430000021 is 120000034333004.

It is not a de Polignac number, because 400333430000021 - 2³⁸ = 400058552093077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400333430060021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217008500 + ... + 218845506.

It is an arithmetic number, because the mean of its divisors is an integer number (19593523653984).

Almost surely, 2^{400333430000021} is an apocalyptic number.

It is an amenable number.

400333430000021 is a deficient number, since it is larger than the sum of its proper divisors (69911137695595).

400333430000021 is a wasteful number, since it uses less digits than its factorization.

400333430000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859829 (or 1859792 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 400333430000021 its reverse (120000034333004), we get a palindrome (520333464333025).

The spelling of 400333430000021 in words is "four hundred trillion, three hundred thirty-three billion, four hundred thirty million, twenty-one", and thus it is an aban number.