10420136781 has 8 divisors (see below), whose sum is σ = 13922522880. Its totient is φ = 6932254272.

The previous prime is 10420136777. The next prime is 10420136813. The reversal of 10420136781 is 18763102401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10420136781 - 2² = 10420136777 is a prime.

It is a super-2 number, since 2×10420136781² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10420136381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3624220 + ... + 3627093.

It is an arithmetic number, because the mean of its divisors is an integer number (1740315360).

Almost surely, 2^10420136781 is an apocalyptic number.

It is an amenable number.

10420136781 is a deficient number, since it is larger than the sum of its proper divisors (3502386099).

10420136781 is an equidigital number, since it uses as much as digits as its factorization.

10420136781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7251795.

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 10420136781 in words is "ten billion, four hundred twenty million, one hundred thirty-six thousand, seven hundred eighty-one".