21035437345 has 32 divisors (see below), whose sum is σ = 28184325120. Its totient is φ = 14966795520.

The previous prime is 21035437343. The next prime is 21035437349. The reversal of 21035437345 is 54373453012.

It is not a de Polignac number, because 21035437345 - 2¹ = 21035437343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21035437343) 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, 438642 + ... + 484228.

It is an arithmetic number, because the mean of its divisors is an integer number (880760160).

Almost surely, 2^21035437345 is an apocalyptic number.

It is an amenable number.

21035437345 is a deficient number, since it is larger than the sum of its proper divisors (7148887775).

21035437345 is a wasteful number, since it uses less digits than its factorization.

21035437345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45865.

The product of its (nonzero) digits is 151200, while the sum is 37.

The spelling of 21035437345 in words is "twenty-one billion, thirty-five million, four hundred thirty-seven thousand, three hundred forty-five".