21237463242 has 96 divisors (see below), whose sum is σ = 47898364800. Its totient is φ = 6795726336.

The previous prime is 21237463207. The next prime is 21237463249. The reversal of 21237463242 is 24236473212.

21237463242 is a `hidden beast` number, since 2 + 12 + 3 + 7 + 4 + 632 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21237463197 and 21237463206.

It is not an unprimeable number, because it can be changed into a prime (21237463249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23108859 + ... + 23109777.

It is an arithmetic number, because the mean of its divisors is an integer number (498941300).

Almost surely, 2^21237463242 is an apocalyptic number.

21237463242 is an abundant number, since it is smaller than the sum of its proper divisors (26660901558).

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

21237463242 is a wasteful number, since it uses less digits than its factorization.

21237463242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452 (or 1449 counting only the distinct ones).

The product of its digits is 96768, while the sum is 36.

The spelling of 21237463242 in words is "twenty-one billion, two hundred thirty-seven million, four hundred sixty-three thousand, two hundred forty-two".