21040554303152 has 20 divisors (see below), whose sum is σ = 40786067195760. Its totient is φ = 10515117607488.

The previous prime is 21040554303137. The next prime is 21040554303253. The reversal of 21040554303152 is 25130345504012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322437863 + ... + 322503110.

It is an arithmetic number, because the mean of its divisors is an integer number (2039303359788).

Almost surely, 2^{21040554303152} is an apocalyptic number.

It is an amenable number.

21040554303152 is a deficient number, since it is larger than the sum of its proper divisors (19745512892608).

21040554303152 is a wasteful number, since it uses less digits than its factorization.

21040554303152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644943020 (or 644943014 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 21040554303152 its reverse (25130345504012), we get a palindrome (46170899807164).

The spelling of 21040554303152 in words is "twenty-one trillion, forty billion, five hundred fifty-four million, three hundred three thousand, one hundred fifty-two".