21411671427 has 24 divisors (see below), whose sum is σ = 31877790048. Its totient is φ = 13842662400.

The previous prime is 21411671423. The next prime is 21411671431. The reversal of 21411671427 is 72417611412.

21411671427 is a `hidden beast` number, since 214 + 1 + 16 + 7 + 1 + 427 = 666.

It is an interprime number because it is at equal distance from previous prime (21411671423) and next prime (21411671431).

It is not a de Polignac number, because 21411671427 - 2² = 21411671423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21411671391 and 21411671400.

It is not an unprimeable number, because it can be changed into a prime (21411671423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 235678 + ... + 313635.

It is an arithmetic number, because the mean of its divisors is an integer number (1328241252).

Almost surely, 2^21411671427 is an apocalyptic number.

21411671427 is a deficient number, since it is larger than the sum of its proper divisors (10466118621).

21411671427 is a wasteful number, since it uses less digits than its factorization.

21411671427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549451 (or 549448 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The spelling of 21411671427 in words is "twenty-one billion, four hundred eleven million, six hundred seventy-one thousand, four hundred twenty-seven".