21464700377 has 2 divisors, whose sum is σ = 21464700378. Its totient is φ = 21464700376.

The previous prime is 21464700353. The next prime is 21464700469. The reversal of 21464700377 is 77300746412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19885512256 + 1579188121 = 141016^2 + 39739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21464700377 is a prime.

It is not a weakly prime, because it can be changed into another prime (21464700317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10732350188 + 10732350189.

It is an arithmetic number, because the mean of its divisors is an integer number (10732350189).

Almost surely, 2^21464700377 is an apocalyptic number.

It is an amenable number.

21464700377 is a deficient number, since it is larger than the sum of its proper divisors (1).

21464700377 is an equidigital number, since it uses as much as digits as its factorization.

21464700377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 41.

The spelling of 21464700377 in words is "twenty-one billion, four hundred sixty-four million, seven hundred thousand, three hundred seventy-seven".