21477796710 has 32 divisors (see below), whose sum is σ = 52316070912. Its totient is φ = 5641928160.

The previous prime is 21477796657. The next prime is 21477796729. The reversal of 21477796710 is 1769777412.

It is a super-2 number, since 2×21477796710² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5340726 + ... + 5344745.

It is an arithmetic number, because the mean of its divisors is an integer number (1634877216).

Almost surely, 2^21477796710 is an apocalyptic number.

21477796710 is an abundant number, since it is smaller than the sum of its proper divisors (30838274202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21477796710 is a wasteful number, since it uses less digits than its factorization.

21477796710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10685548.

The product of its (nonzero) digits is 1037232, while the sum is 51.

The spelling of 21477796710 in words is "twenty-one billion, four hundred seventy-seven million, seven hundred ninety-six thousand, seven hundred ten".