21373577227450 has 48 divisors (see below), whose sum is σ = 45434842608960. Its totient is φ = 7327966821120.

The previous prime is 21373577227447. The next prime is 21373577227469. The reversal of 21373577227450 is 5472277537312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21373577227391 and 21373577227400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23140189 + ... + 24046111.

It is an arithmetic number, because the mean of its divisors is an integer number (946559221020).

Almost surely, 2^{21373577227450} is an apocalyptic number.

21373577227450 is an abundant number, since it is smaller than the sum of its proper divisors (24061265381510).

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

21373577227450 is a wasteful number, since it uses less digits than its factorization.

21373577227450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973351 (or 973346 counting only the distinct ones).

The product of its (nonzero) digits is 17287200, while the sum is 55.

The spelling of 21373577227450 in words is "twenty-one trillion, three hundred seventy-three billion, five hundred seventy-seven million, two hundred twenty-seven thousand, four hundred fifty".