21746225355436 has 24 divisors (see below), whose sum is σ = 40061918834784. Its totient is φ = 10308329982720.

The previous prime is 21746225355377. The next prime is 21746225355473. The reversal of 21746225355436 is 63455352264712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045883475 + ... + 1045904266.

It is an arithmetic number, because the mean of its divisors is an integer number (1669246618116).

Almost surely, 2^{21746225355436} is an apocalyptic number.

It is an amenable number.

21746225355436 is a deficient number, since it is larger than the sum of its proper divisors (18315693479348).

21746225355436 is a wasteful number, since it uses less digits than its factorization.

21746225355436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091787881 (or 2091787879 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 55.

The spelling of 21746225355436 in words is "twenty-one trillion, seven hundred forty-six billion, two hundred twenty-five million, three hundred fifty-five thousand, four hundred thirty-six".