21473010886487 has 8 divisors (see below), whose sum is σ = 21486529979904. Its totient is φ = 21459495061368.

The previous prime is 21473010886403. The next prime is 21473010886493. The reversal of 21473010886487 is 78468801037412.

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 21473010886487 - 2²⁴ = 21472994109271 is a prime.

It is a super-2 number, since 2×21473010886487² (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 (21473010886387) 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, 12394388 + ... + 14020230.

It is an arithmetic number, because the mean of its divisors is an integer number (2685816247488).

Almost surely, 2^{21473010886487} is an apocalyptic number.

21473010886487 is a deficient number, since it is larger than the sum of its proper divisors (13519093417).

21473010886487 is a wasteful number, since it uses less digits than its factorization.

21473010886487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634149.

The product of its (nonzero) digits is 14450688, while the sum is 59.

The spelling of 21473010886487 in words is "twenty-one trillion, four hundred seventy-three billion, ten million, eight hundred eighty-six thousand, four hundred eighty-seven".