20295029556 has 72 divisors (see below), whose sum is σ = 54352161864. Its totient is φ = 6363187200.

The previous prime is 20295029543. The next prime is 20295029597. The reversal of 20295029556 is 65592059202.

20295029556 is a `hidden beast` number, since 2 + 0 + 2 + 9 + 502 + 95 + 56 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 868245156 + 19426784400 = 29466^2 + 139380^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1093006 + ... + 1111418.

It is an arithmetic number, because the mean of its divisors is an integer number (754891137).

Almost surely, 2^20295029556 is an apocalyptic number.

It is an amenable number.

20295029556 is an abundant number, since it is smaller than the sum of its proper divisors (34057132308).

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

20295029556 is a wasteful number, since it uses less digits than its factorization.

20295029556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20241 (or 20236 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 20295029556 in words is "twenty billion, two hundred ninety-five million, twenty-nine thousand, five hundred fifty-six".