21532425401045 has 32 divisors (see below), whose sum is σ = 29946379246560. Its totient is φ = 14720186327040.

The previous prime is 21532425401041. The next prime is 21532425401083. The reversal of 21532425401045 is 54010452423512.

It can be written as a sum of positive squares in 16 ways, for example, as 6203078397604 + 15329347003441 = 2490598^2 + 3915271^2 .

It is not a de Polignac number, because 21532425401045 - 2² = 21532425401041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21532425401041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159656840 + ... + 159791649.

It is an arithmetic number, because the mean of its divisors is an integer number (935824351455).

Almost surely, 2^{21532425401045} is an apocalyptic number.

It is an amenable number.

21532425401045 is a deficient number, since it is larger than the sum of its proper divisors (8413953845515).

21532425401045 is a wasteful number, since it uses less digits than its factorization.

21532425401045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319448585.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 21532425401045 its reverse (54010452423512), we get a palindrome (75542877824557).

The spelling of 21532425401045 in words is "twenty-one trillion, five hundred thirty-two billion, four hundred twenty-five million, four hundred one thousand, forty-five".