21003763434 has 32 divisors (see below), whose sum is σ = 43750544256. Its totient is φ = 6716082240.

The previous prime is 21003763423. The next prime is 21003763457. The reversal of 21003763434 is 43436730012.

21003763434 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21003763395 and 21003763404.

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, 650517 + ... + 682040.

It is an arithmetic number, because the mean of its divisors is an integer number (1367204508).

Almost surely, 2^21003763434 is an apocalyptic number.

21003763434 is an abundant number, since it is smaller than the sum of its proper divisors (22746780822).

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

21003763434 is a wasteful number, since it uses less digits than its factorization.

21003763434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332670.

The product of its (nonzero) digits is 36288, while the sum is 33.

The spelling of 21003763434 in words is "twenty-one billion, three million, seven hundred sixty-three thousand, four hundred thirty-four".