21240335350052 has 24 divisors (see below), whose sum is σ = 45748414600896. Its totient is φ = 8402770028448.

The previous prime is 21240335349983. The next prime is 21240335350121. The reversal of 21240335350052 is 25005353304212.

It is an interprime number because it is at equal distance from previous prime (21240335349983) and next prime (21240335350121).

It is a junction number, because it is equal to n+sod(n) for n = 21240335349994 and 21240335350021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29176284458 + ... + 29176285185.

It is an arithmetic number, because the mean of its divisors is an integer number (1906183941704).

Almost surely, 2^{21240335350052} is an apocalyptic number.

It is an amenable number.

21240335350052 is an abundant number, since it is smaller than the sum of its proper divisors (24508079250844).

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

21240335350052 is a wasteful number, since it uses less digits than its factorization.

21240335350052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58352569667 (or 58352569665 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 21240335350052 its reverse (25005353304212), we get a palindrome (46245688654264).

The spelling of 21240335350052 in words is "twenty-one trillion, two hundred forty billion, three hundred thirty-five million, three hundred fifty thousand, fifty-two".