320203525470021 has 16 divisors (see below), whose sum is σ = 476833497925120. Its totient is φ = 212362959893760.

The previous prime is 320203525470011. The next prime is 320203525470041. The reversal of 320203525470021 is 120074525302023.

320203525470021 is a `hidden beast` number, since 3 + 20 + 20 + 3 + 52 + 547 + 0 + 0 + 21 = 666.

It is not a de Polignac number, because 320203525470021 - 2⁶ = 320203525469957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320203525470001) 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, 30723802645 + ... + 30723813066.

It is an arithmetic number, because the mean of its divisors is an integer number (29802093620320).

Almost surely, 2^{320203525470021} is an apocalyptic number.

It is an amenable number.

320203525470021 is a deficient number, since it is larger than the sum of its proper divisors (156629972455099).

320203525470021 is a wasteful number, since it uses less digits than its factorization.

320203525470021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61447615913 (or 61447615907 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 320203525470021 in words is "three hundred twenty trillion, two hundred three billion, five hundred twenty-five million, four hundred seventy thousand, twenty-one".