20102030634 has 16 divisors (see below), whose sum is σ = 45947498688. Its totient is φ = 5743437312.

The previous prime is 20102030623. The next prime is 20102030651. The reversal of 20102030634 is 43603020102.

It is a happy number.

It is a super-2 number, since 2×20102030634² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20102030634.

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, 239309847 + ... + 239309930.

It is an arithmetic number, because the mean of its divisors is an integer number (2871718668).

Almost surely, 2^20102030634 is an apocalyptic number.

20102030634 is an abundant number, since it is smaller than the sum of its proper divisors (25845468054).

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

20102030634 is a wasteful number, since it uses less digits than its factorization.

20102030634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478619789.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20102030634 its reverse (43603020102), we get a palindrome (63705050736).

The spelling of 20102030634 in words is "twenty billion, one hundred two million, thirty thousand, six hundred thirty-four".