20477343755 has 32 divisors (see below), whose sum is σ = 27707194368. Its totient is φ = 14399987200.

The previous prime is 20477343743. The next prime is 20477343779. The reversal of 20477343755 is 55734377402.

It is not a de Polignac number, because 20477343755 - 2¹⁰ = 20477342731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

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, 166835 + ... + 262275.

It is an arithmetic number, because the mean of its divisors is an integer number (865849824).

Almost surely, 2^20477343755 is an apocalyptic number.

20477343755 is a deficient number, since it is larger than the sum of its proper divisors (7229850613).

20477343755 is a wasteful number, since it uses less digits than its factorization.

20477343755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95587.

The product of its (nonzero) digits is 2469600, while the sum is 47.

The spelling of 20477343755 in words is "twenty billion, four hundred seventy-seven million, three hundred forty-three thousand, seven hundred fifty-five".