21770757963 has 16 divisors (see below), whose sum is σ = 32272505760. Its totient is φ = 14505049728.

The previous prime is 21770757937. The next prime is 21770758001. The reversal of 21770757963 is 36975707712.

21770757963 is a `hidden beast` number, since 2 + 1 + 7 + 7 + 0 + 7 + 579 + 63 = 666.

It is not a de Polignac number, because 21770757963 - 2¹² = 21770753867 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21770757263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198570 + ... + 288047.

It is an arithmetic number, because the mean of its divisors is an integer number (2017031610).

Almost surely, 2^21770757963 is an apocalyptic number.

21770757963 is a deficient number, since it is larger than the sum of its proper divisors (10501747797).

21770757963 is a wasteful number, since it uses less digits than its factorization.

21770757963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488283 (or 488277 counting only the distinct ones).

The product of its (nonzero) digits is 3889620, while the sum is 54.

The spelling of 21770757963 in words is "twenty-one billion, seven hundred seventy million, seven hundred fifty-seven thousand, nine hundred sixty-three".