20425660761 has 32 divisors (see below), whose sum is σ = 31018982400. Its totient is φ = 11834398400.

The previous prime is 20425660733. The next prime is 20425660771. The reversal of 20425660761 is 16706652402.

It is not a de Polignac number, because 20425660761 - 2²¹ = 20423563609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20425660721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1586731 + ... + 1599551.

It is an arithmetic number, because the mean of its divisors is an integer number (969343200).

Almost surely, 2^20425660761 is an apocalyptic number.

It is an amenable number.

20425660761 is a deficient number, since it is larger than the sum of its proper divisors (10593321639).

20425660761 is a wasteful number, since it uses less digits than its factorization.

20425660761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14957.

The product of its (nonzero) digits is 120960, while the sum is 39.

It can be divided in two parts, 20425 and 660761, that added together give a palindrome (681186).

The spelling of 20425660761 in words is "twenty billion, four hundred twenty-five million, six hundred sixty thousand, seven hundred sixty-one".