20102500424 has 8 divisors (see below), whose sum is σ = 37692188310. Its totient is φ = 10051250208.

The previous prime is 20102500409. The next prime is 20102500471. The reversal of 20102500424 is 42400520102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13560602500 + 6541897924 = 116450^2 + 80882^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20102500424² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20102500396 and 20102500405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256406269 + ... + 1256406284.

Almost surely, 2^20102500424 is an apocalyptic number.

It is an amenable number.

20102500424 is a deficient number, since it is larger than the sum of its proper divisors (17589687886).

20102500424 is a wasteful number, since it uses less digits than its factorization.

20102500424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512812559 (or 2512812555 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The spelling of 20102500424 in words is "twenty billion, one hundred two million, five hundred thousand, four hundred twenty-four".