21451542035 has 16 divisors (see below), whose sum is σ = 32093736192. Its totient is φ = 13372389600.

The previous prime is 21451542031. The next prime is 21451542071. The reversal of 21451542035 is 53024515412.

It is not a de Polignac number, because 21451542035 - 2² = 21451542031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21451541992 and 21451542010.

It is not an unprimeable number, because it can be changed into a prime (21451542031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27858761 + ... + 27859530.

It is an arithmetic number, because the mean of its divisors is an integer number (2005858512).

Almost surely, 2^21451542035 is an apocalyptic number.

21451542035 is a deficient number, since it is larger than the sum of its proper divisors (10642194157).

21451542035 is a wasteful number, since it uses less digits than its factorization.

21451542035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55718314.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 21451542035 in words is "twenty-one billion, four hundred fifty-one million, five hundred forty-two thousand, thirty-five".