21053435241 has 16 divisors (see below), whose sum is σ = 29590414400. Its totient is φ = 13278126528.

The previous prime is 21053435191. The next prime is 21053435281. The reversal of 21053435241 is 14253435012.

It is not a de Polignac number, because 21053435241 - 2¹³ = 21053427049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21053435199 and 21053435208.

It is not an unprimeable number, because it can be changed into a prime (21053435281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220066 + ... + 300891.

It is an arithmetic number, because the mean of its divisors is an integer number (1849400900).

Almost surely, 2^21053435241 is an apocalyptic number.

It is an amenable number.

21053435241 is a deficient number, since it is larger than the sum of its proper divisors (8536979159).

21053435241 is a wasteful number, since it uses less digits than its factorization.

21053435241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521688.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 21053435241 in words is "twenty-one billion, fifty-three million, four hundred thirty-five thousand, two hundred forty-one".