21254725367 has 2 divisors, whose sum is σ = 21254725368. Its totient is φ = 21254725366.

The previous prime is 21254725357. The next prime is 21254725411. The reversal of 21254725367 is 76352745212.

It is an a-pointer prime, because the next prime (21254725411) can be obtained adding 21254725367 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21254725367 - 2⁸ = 21254725111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21254725357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10627362683 + 10627362684.

It is an arithmetic number, because the mean of its divisors is an integer number (10627362684).

Almost surely, 2^21254725367 is an apocalyptic number.

21254725367 is a deficient number, since it is larger than the sum of its proper divisors (1).

21254725367 is an equidigital number, since it uses as much as digits as its factorization.

21254725367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 44.

The spelling of 21254725367 in words is "twenty-one billion, two hundred fifty-four million, seven hundred twenty-five thousand, three hundred sixty-seven".