20435156040 has 128 divisors (see below), whose sum is σ = 67631760000. Its totient is φ = 4907489280.

The previous prime is 20435156039. The next prime is 20435156059. The reversal of 20435156040 is 4065153402.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20435155989 and 20435156007.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95790 + ... + 223709.

It is an arithmetic number, because the mean of its divisors is an integer number (528373125).

Almost surely, 2^20435156040 is an apocalyptic number.

20435156040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20435156040 is an abundant number, since it is smaller than the sum of its proper divisors (47196603960).

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

20435156040 is a wasteful number, since it uses less digits than its factorization.

20435156040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319567 (or 319563 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 20435156040 in words is "twenty billion, four hundred thirty-five million, one hundred fifty-six thousand, forty".