21485148677077 has 8 divisors (see below), whose sum is σ = 21838247631200. Its totient is φ = 21134885859504.

The previous prime is 21485148677021. The next prime is 21485148677093. The reversal of 21485148677077 is 77077684158412.

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

It is a cyclic number.

It is not a de Polignac number, because 21485148677077 - 2¹⁹ = 21485148152789 is a prime.

It is a super-2 number, since 2×21485148677077² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21485148677477) 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, 709018863 + ... + 709049164.

It is an arithmetic number, because the mean of its divisors is an integer number (2729780953900).

Almost surely, 2^{21485148677077} is an apocalyptic number.

It is an amenable number.

21485148677077 is a deficient number, since it is larger than the sum of its proper divisors (353098954123).

21485148677077 is a wasteful number, since it uses less digits than its factorization.

21485148677077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418068275.

The product of its (nonzero) digits is 147517440, while the sum is 67.

The spelling of 21485148677077 in words is "twenty-one trillion, four hundred eighty-five billion, one hundred forty-eight million, six hundred seventy-seven thousand, seventy-seven".