21461941892 has 24 divisors (see below), whose sum is σ = 38085282816. Its totient is φ = 10580528448.

The previous prime is 21461941889. The next prime is 21461941909. The reversal of 21461941892 is 29814916412.

It is a super-2 number, since 2×21461941892² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1047773 + ... + 1068059.

It is an arithmetic number, because the mean of its divisors is an integer number (1586886784).

Almost surely, 2^21461941892 is an apocalyptic number.

It is an amenable number.

21461941892 is a deficient number, since it is larger than the sum of its proper divisors (16623340924).

21461941892 is a wasteful number, since it uses less digits than its factorization.

21461941892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23987 (or 23985 counting only the distinct ones).

The product of its digits is 248832, while the sum is 47.

The spelling of 21461941892 in words is "twenty-one billion, four hundred sixty-one million, nine hundred forty-one thousand, eight hundred ninety-two".