21235465700 has 18 divisors (see below), whose sum is σ = 46080960786. Its totient is φ = 8494186240.

The previous prime is 21235465681. The next prime is 21235465721. The reversal of 21235465700 is 756453212.

It can be written as a sum of positive squares in 3 ways, for example, as 413552896 + 20821912804 = 20336^2 + 144298^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106177229 + ... + 106177428.

It is an arithmetic number, because the mean of its divisors is an integer number (2560053377).

Almost surely, 2^21235465700 is an apocalyptic number.

21235465700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21235465700 is an abundant number, since it is smaller than the sum of its proper divisors (24845495086).

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

21235465700 is a wasteful number, since it uses less digits than its factorization.

21235465700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212354671 (or 212354664 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 21235465700 in words is "twenty-one billion, two hundred thirty-five million, four hundred sixty-five thousand, seven hundred".