21460233787 has 2 divisors, whose sum is σ = 21460233788. Its totient is φ = 21460233786.

The previous prime is 21460233671. The next prime is 21460233857. The reversal of 21460233787 is 78733206412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21460233787 - 2²⁷ = 21326016059 is a prime.

It is a super-2 number, since 2×21460233787² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21460233287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10730116893 + 10730116894.

It is an arithmetic number, because the mean of its divisors is an integer number (10730116894).

Almost surely, 2^21460233787 is an apocalyptic number.

21460233787 is a deficient number, since it is larger than the sum of its proper divisors (1).

21460233787 is an equidigital number, since it uses as much as digits as its factorization.

21460233787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 21460233787 in words is "twenty-one billion, four hundred sixty million, two hundred thirty-three thousand, seven hundred eighty-seven".