21070653370400 has 72 divisors (see below), whose sum is σ = 51948027121284. Its totient is φ = 8344813184000.

The previous prime is 21070653370397. The next prime is 21070653370411. The reversal of 21070653370400 is 407335607012.

It can be written as a sum of positive squares in 6 ways, for example, as 12389639691664 + 8681013678736 = 3519892^2 + 2946356^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130306907 + ... + 130468506.

Almost surely, 2^{21070653370400} is an apocalyptic number.

21070653370400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21070653370400 is an abundant number, since it is smaller than the sum of its proper divisors (30877373750884).

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

21070653370400 is a wasteful number, since it uses less digits than its factorization.

21070653370400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260775534 (or 260775521 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 38.

Adding to 21070653370400 its reverse (407335607012), we get a palindrome (21477988977412).

The spelling of 21070653370400 in words is "twenty-one trillion, seventy billion, six hundred fifty-three million, three hundred seventy thousand, four hundred".