21011776346 has 16 divisors (see below), whose sum is σ = 34385160960. Its totient is φ = 9550181280.

The previous prime is 21011776327. The next prime is 21011776349. The reversal of 21011776346 is 64367711012.

It is a super-2 number, since 2×21011776346² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21011776349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560375 + ... + 596693.

It is an arithmetic number, because the mean of its divisors is an integer number (2149072560).

Almost surely, 2^21011776346 is an apocalyptic number.

21011776346 is a deficient number, since it is larger than the sum of its proper divisors (13373384614).

21011776346 is a wasteful number, since it uses less digits than its factorization.

21011776346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62629.

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 21011776346 in words is "twenty-one billion, eleven million, seven hundred seventy-six thousand, three hundred forty-six".