21735053712 has 60 divisors (see below), whose sum is σ = 60838317904. Its totient is φ = 7243784640.

The previous prime is 21735053657. The next prime is 21735053713.

It is a happy number.

21735053712 is a `hidden beast` number, since 2 + 1 + 73 + 50 + 537 + 1 + 2 = 666.

21735053712 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21735053713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1300803 + ... + 1317405.

Almost surely, 2^21735053712 is an apocalyptic number.

It is an amenable number.

21735053712 is an abundant number, since it is smaller than the sum of its proper divisors (39103264192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21735053712 is a wasteful number, since it uses less digits than its factorization.

21735053712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25708 (or 25699 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The spelling of 21735053712 in words is "twenty-one billion, seven hundred thirty-five million, fifty-three thousand, seven hundred twelve".