20154738735 has 20 divisors (see below), whose sum is σ = 36129236088. Its totient is φ = 10749193776.

The previous prime is 20154738731. The next prime is 20154738749. The reversal of 20154738735 is 53783745102.

20154738735 is a `hidden beast` number, since 2 + 0 + 1 + 547 + 38 + 73 + 5 = 666.

It is not a de Polignac number, because 20154738735 - 2² = 20154738731 is a prime.

It is a super-2 number, since 2×20154738735² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154738731) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24881989 + ... + 24882798.

Almost surely, 2^20154738735 is an apocalyptic number.

20154738735 is a deficient number, since it is larger than the sum of its proper divisors (15974497353).

20154738735 is an equidigital number, since it uses as much as digits as its factorization.

20154738735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49764804 (or 49764795 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 20154738735 in words is "twenty billion, one hundred fifty-four million, seven hundred thirty-eight thousand, seven hundred thirty-five".