21250641434530 has 16 divisors (see below), whose sum is σ = 38256970597560. Its totient is φ = 8498964125952.

The previous prime is 21250641434507. The next prime is 21250641434591. The reversal of 21250641434530 is 3543414605212.

It can be written as a sum of positive squares in 4 ways, for example, as 20379094091041 + 871547343489 = 4514321^2 + 933567^2 .

It is a super-2 number, since 2×21250641434530² (a number of 27 digits) contains 22 as substring.

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, 161486925 + ... + 161618464.

Almost surely, 2^{21250641434530} is an apocalyptic number.

21250641434530 is a deficient number, since it is larger than the sum of its proper divisors (17006329163030).

21250641434530 is a wasteful number, since it uses less digits than its factorization.

21250641434530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323111973.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 21250641434530 in words is "twenty-one trillion, two hundred fifty billion, six hundred forty-one million, four hundred thirty-four thousand, five hundred thirty".