34203256021 has 4 divisors (see below), whose sum is σ = 37312642944. Its totient is φ = 31093869100.

The previous prime is 34203256019. The next prime is 34203256121. The reversal of 34203256021 is 12065230243.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 34203256021 - 2¹ = 34203256019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34203256121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1554693445 + ... + 1554693466.

It is an arithmetic number, because the mean of its divisors is an integer number (9328160736).

Almost surely, 2^34203256021 is an apocalyptic number.

It is an amenable number.

34203256021 is a deficient number, since it is larger than the sum of its proper divisors (3109386923).

34203256021 is a wasteful number, since it uses less digits than its factorization.

34203256021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109386922.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 34203256021 its reverse (12065230243), we get a palindrome (46268486264).

The spelling of 34203256021 in words is "thirty-four billion, two hundred three million, two hundred fifty-six thousand, twenty-one".