21453514350 has 96 divisors (see below), whose sum is σ = 55012193280. Its totient is φ = 5527200000.

The previous prime is 21453514349. The next prime is 21453514399. The reversal of 21453514350 is 5341535412.

It is a congruent number.

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, 3060850 + ... + 3067850.

It is an arithmetic number, because the mean of its divisors is an integer number (573043680).

Almost surely, 2^21453514350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21453514350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27506096640).

21453514350 is an abundant number, since it is smaller than the sum of its proper divisors (33558678930).

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

21453514350 is a wasteful number, since it uses less digits than its factorization.

21453514350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7706 (or 7701 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

It can be divided in two parts, 2145351 and 4350, that added together give a triangular number (2149701 = T₂₀₇₃).

The spelling of 21453514350 in words is "twenty-one billion, four hundred fifty-three million, five hundred fourteen thousand, three hundred fifty".