20507423734 has 32 divisors (see below), whose sum is σ = 35666459136. Its totient is φ = 8661287040.

The previous prime is 20507423701. The next prime is 20507423773. The reversal of 20507423734 is 43732470502.

It is a junction number, because it is equal to n+sod(n) for n = 20507423693 and 20507423702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4254894 + ... + 4259710.

It is an arithmetic number, because the mean of its divisors is an integer number (1114576848).

Almost surely, 2^20507423734 is an apocalyptic number.

20507423734 is a deficient number, since it is larger than the sum of its proper divisors (15159035402).

20507423734 is a wasteful number, since it uses less digits than its factorization.

20507423734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9180.

The product of its (nonzero) digits is 141120, while the sum is 37.

The spelling of 20507423734 in words is "twenty billion, five hundred seven million, four hundred twenty-three thousand, seven hundred thirty-four".