21435760077 has 8 divisors (see below), whose sum is σ = 28972534464. Its totient is φ = 14094746208.

The previous prime is 21435760067. The next prime is 21435760091. The reversal of 21435760077 is 77006753412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21435760077 - 2¹² = 21435755981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21435760067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48939873 + ... + 48940310.

It is an arithmetic number, because the mean of its divisors is an integer number (3621566808).

Almost surely, 2^21435760077 is an apocalyptic number.

It is an amenable number.

21435760077 is a deficient number, since it is larger than the sum of its proper divisors (7536774387).

21435760077 is an equidigital number, since it uses as much as digits as its factorization.

21435760077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97880259.

The product of its (nonzero) digits is 246960, while the sum is 42.

The spelling of 21435760077 in words is "twenty-one billion, four hundred thirty-five million, seven hundred sixty thousand, seventy-seven".