21235450446 has 48 divisors (see below), whose sum is σ = 52655576064. Its totient is φ = 6058899792.

The previous prime is 21235450429. The next prime is 21235450447. The reversal of 21235450446 is 64405453212.

21235450446 is a `hidden beast` number, since 212 + 354 + 50 + 4 + 46 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21235450446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21235450447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24310 + ... + 207513.

It is an arithmetic number, because the mean of its divisors is an integer number (1096991168).

Almost surely, 2^21235450446 is an apocalyptic number.

21235450446 is an abundant number, since it is smaller than the sum of its proper divisors (31420125618).

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

21235450446 is a wasteful number, since it uses less digits than its factorization.

21235450446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232565 (or 232562 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 21235450446 in words is "twenty-one billion, two hundred thirty-five million, four hundred fifty thousand, four hundred forty-six".