20545403734 has 16 divisors (see below), whose sum is σ = 31665344976. Its totient is φ = 9990540000.

The previous prime is 20545403719. The next prime is 20545403761. The reversal of 20545403734 is 43730454502.

It is a super-2 number, since 2×20545403734² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 20545403693 and 20545403702.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 104904 + ... + 228244.

It is an arithmetic number, because the mean of its divisors is an integer number (1979084061).

Almost surely, 2^20545403734 is an apocalyptic number.

20545403734 is a deficient number, since it is larger than the sum of its proper divisors (11119941242).

20545403734 is a wasteful number, since it uses less digits than its factorization.

20545403734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125631.

The product of its (nonzero) digits is 201600, while the sum is 37.

The spelling of 20545403734 in words is "twenty billion, five hundred forty-five million, four hundred three thousand, seven hundred thirty-four".