42920899239869 has 12 divisors (see below), whose sum is σ = 49950016508700. Its totient is φ = 36773409089088.

The previous prime is 42920899239857. The next prime is 42920899239997. The reversal of 42920899239869 is 96893299802924.

It can be written as a sum of positive squares in 2 ways, for example, as 22377914080900 + 20542985158969 = 4730530^2 + 4532437^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42920899239869 is a prime.

It is a super-2 number, since 2×42920899239869² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42920899239793 and 42920899239802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42920899233869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189565664 + ... + 189791945.

It is an arithmetic number, because the mean of its divisors is an integer number (4162501375725).

Almost surely, 2^{42920899239869} is an apocalyptic number.

42920899239869 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

42920899239869 is a deficient number, since it is larger than the sum of its proper divisors (7029117268831).

42920899239869 is a wasteful number, since it uses less digits than its factorization.

42920899239869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379359932 (or 379359925 counting only the distinct ones).

The product of its (nonzero) digits is 2176782336, while the sum is 80.

The spelling of 42920899239869 in words is "forty-two trillion, nine hundred twenty billion, eight hundred ninety-nine million, two hundred thirty-nine thousand, eight hundred sixty-nine".