320020403421400 has 48 divisors (see below), whose sum is σ = 811688114138040. Its totient is φ = 116371055788800.

The previous prime is 320020403421377. The next prime is 320020403421419. The reversal of 320020403421400 is 4124304020023.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72731907669 + ... + 72731912068.

Almost surely, 2^{320020403421400} is an apocalyptic number.

It is an amenable number.

320020403421400 is an abundant number, since it is smaller than the sum of its proper divisors (491667710716640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320020403421400 is a wasteful number, since it uses less digits than its factorization.

320020403421400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145463819764 (or 145463819755 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 320020403421400 its reverse (4124304020023), we get a palindrome (324144707441423).

The spelling of 320020403421400 in words is "three hundred twenty trillion, twenty billion, four hundred three million, four hundred twenty-one thousand, four hundred".