21035051436 has 144 divisors (see below), whose sum is σ = 57917486592. Its totient is φ = 5924016000.

The previous prime is 21035051417. The next prime is 21035051441. The reversal of 21035051436 is 63415053012.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16093495 + ... + 16094801.

It is an arithmetic number, because the mean of its divisors is an integer number (402204768).

Almost surely, 2^21035051436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21035051436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28958743296).

21035051436 is an abundant number, since it is smaller than the sum of its proper divisors (36882435156).

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

21035051436 is a wasteful number, since it uses less digits than its factorization.

21035051436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700 (or 1691 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 21035051436 in words is "twenty-one billion, thirty-five million, fifty-one thousand, four hundred thirty-six".