21041254352 has 10 divisors (see below), whose sum is σ = 40767430338. Its totient is φ = 10520627168.

The previous prime is 21041254337. The next prime is 21041254411. The reversal of 21041254352 is 25345214012.

It can be written as a sum of positive squares in only one way, i.e., 19548513856 + 1492740496 = 139816^2 + 38636^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657539183 + ... + 657539214.

Almost surely, 2^21041254352 is an apocalyptic number.

It is an amenable number.

21041254352 is a deficient number, since it is larger than the sum of its proper divisors (19726175986).

21041254352 is a wasteful number, since it uses less digits than its factorization.

21041254352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315078405 (or 1315078399 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 21041254352 its reverse (25345214012), we get a palindrome (46386468364).

The spelling of 21041254352 in words is "twenty-one billion, forty-one million, two hundred fifty-four thousand, three hundred fifty-two".